diff --git a/src/abc303/A/in_1.txt b/src/abc303/A/in_1.txt
new file mode 100644
index 0000000..caaa365
--- /dev/null
+++ b/src/abc303/A/in_1.txt
@@ -0,0 +1,3 @@
+3
+l0w
+1ow
diff --git a/src/abc303/A/in_2.txt b/src/abc303/A/in_2.txt
new file mode 100644
index 0000000..2be0b77
--- /dev/null
+++ b/src/abc303/A/in_2.txt
@@ -0,0 +1,3 @@
+3
+abc
+arc
diff --git a/src/abc303/A/in_3.txt b/src/abc303/A/in_3.txt
new file mode 100644
index 0000000..8a1bb8a
--- /dev/null
+++ b/src/abc303/A/in_3.txt
@@ -0,0 +1,3 @@
+4
+nok0
+n0ko
diff --git a/src/abc303/A/main b/src/abc303/A/main
new file mode 100755
index 0000000..b0b7b80
Binary files /dev/null and b/src/abc303/A/main differ
diff --git a/src/abc303/A/main.cpp b/src/abc303/A/main.cpp
new file mode 100644
index 0000000..d364af4
--- /dev/null
+++ b/src/abc303/A/main.cpp
@@ -0,0 +1,44 @@
+ #include "bits/stdc++.h"
+
+using namespace std;
+
+#define sp(x) cout<<setprecision(x);
+#define FOR(i,a,b) for(int i=(a);i<(b);i++)
+#define REP(i,n) FOR(i,0,n)
+#define all(a) (a).begin(), (a).end()
+#define inf 10000000
+#define linf INT64_MAX*0.99
+#define print(s) cout<<(s)<<endl
+#define lint long long
+#define yes "Yes"
+#define no "No"
+
+typedef pair<int, int> P;
+ 
+int main(){
+    ios::sync_with_stdio(false);
+    cin.tie(0);
+    int n; cin>>n;
+    string s, t; cin>>s>>t;
+    bool flag = true;
+    REP(i, n){
+        if(s[i] != t[i]){
+            if(s[i] == '0'){
+                if(t[i] == 'o') continue;
+            }
+            else if(s[i] == '1'){
+                if(t[i] == 'l') continue;
+            }
+            else if(s[i] == 'o'){
+                if(t[i] == '0') continue;
+            }
+            else if(s[i] == 'l'){
+                if(t[i] == '1') continue;
+            }
+            else flag = false;
+        }
+    }
+    if(flag) cout << "Yes" <<endl;
+    else cout << "No" << endl;
+    return 0;
+}
diff --git a/src/abc303/A/metadata.json b/src/abc303/A/metadata.json
new file mode 100644
index 0000000..883d978
--- /dev/null
+++ b/src/abc303/A/metadata.json
@@ -0,0 +1,17 @@
+{
+ "code_filename": "main.cpp",
+ "judge": {
+  "judge_type": "normal"
+ },
+ "lang": "cpp",
+ "problem": {
+  "alphabet": "A",
+  "contest": {
+   "contest_id": "abc303"
+  },
+  "problem_id": "abc303_a"
+ },
+ "sample_in_pattern": "in_*.txt",
+ "sample_out_pattern": "out_*.txt",
+ "timeout_ms": 2000
+}
diff --git a/src/abc303/A/out_1.txt b/src/abc303/A/out_1.txt
new file mode 100644
index 0000000..dcd7a5d
--- /dev/null
+++ b/src/abc303/A/out_1.txt
@@ -0,0 +1 @@
+Yes
diff --git a/src/abc303/A/out_2.txt b/src/abc303/A/out_2.txt
new file mode 100644
index 0000000..cf45697
--- /dev/null
+++ b/src/abc303/A/out_2.txt
@@ -0,0 +1 @@
+No
diff --git a/src/abc303/A/out_3.txt b/src/abc303/A/out_3.txt
new file mode 100644
index 0000000..dcd7a5d
--- /dev/null
+++ b/src/abc303/A/out_3.txt
@@ -0,0 +1 @@
+Yes
diff --git a/src/abc303/B/in_1.txt b/src/abc303/B/in_1.txt
new file mode 100644
index 0000000..0a667f0
--- /dev/null
+++ b/src/abc303/B/in_1.txt
@@ -0,0 +1,3 @@
+4 2
+1 2 3 4
+4 3 1 2
diff --git a/src/abc303/B/in_2.txt b/src/abc303/B/in_2.txt
new file mode 100644
index 0000000..31be842
--- /dev/null
+++ b/src/abc303/B/in_2.txt
@@ -0,0 +1,4 @@
+3 3
+1 2 3
+3 1 2
+1 2 3
diff --git a/src/abc303/B/in_3.txt b/src/abc303/B/in_3.txt
new file mode 100644
index 0000000..9d96b16
--- /dev/null
+++ b/src/abc303/B/in_3.txt
@@ -0,0 +1,11 @@
+10 10
+4 10 7 2 8 3 9 1 6 5
+3 6 2 9 1 8 10 7 4 5
+9 3 4 5 7 10 1 8 2 6
+7 3 1 8 4 9 5 6 2 10
+5 2 1 4 10 7 9 8 3 6
+5 8 1 6 9 3 2 4 7 10
+8 10 3 4 5 7 2 9 6 1
+3 10 2 7 8 5 1 4 9 6
+10 6 1 5 4 2 3 8 9 7
+4 5 9 1 8 2 7 6 3 10
diff --git a/src/abc303/B/main b/src/abc303/B/main
new file mode 100755
index 0000000..ca5740d
Binary files /dev/null and b/src/abc303/B/main differ
diff --git a/src/abc303/B/main.cpp b/src/abc303/B/main.cpp
new file mode 100644
index 0000000..c242564
--- /dev/null
+++ b/src/abc303/B/main.cpp
@@ -0,0 +1,64 @@
+ #include "bits/stdc++.h"
+
+using namespace std;
+
+#define sp(x) cout<<setprecision(x);
+#define FOR(i,a,b) for(int i=(a);i<(b);i++)
+#define REP(i,n) FOR(i,0,n)
+#define all(a) (a).begin(), (a).end()
+#define inf 10000000
+#define linf INT64_MAX*0.99
+#define print(s) cout<<(s)<<endl
+#define lint long long
+#define yes "Yes"
+#define no "No"
+
+typedef pair<int, int> P;
+ 
+int main(){
+    ios::sync_with_stdio(false);
+    cin.tie(0);
+    int n, m; cin>>n>>m;
+    vector<vector<int> > memo(n);
+    REP(i, n){
+        REP(j, n){
+            memo[i].push_back(1);
+        }
+    }
+    vector<vector<int> > a(m);
+    REP(i, m){
+        REP(j, n){
+            int in; cin>>in;
+            a[i].push_back(in - 1);
+        }
+    }
+    REP(i, m){
+        REP(j, n){
+            if(j - 1 < 0){
+                memo[a[i][j]][a[i][j + 1]] = 0;
+                memo[a[i][j + 1]][a[i][j]] = 0;
+            }
+            else if(j + 1 >= n){
+                memo[a[i][j]][a[i][j - 1]] = 0;
+                memo[a[i][j - 1]][a[i][j]] = 0;
+            }
+            else {
+                memo[a[i][j]][a[i][j - 1]] = 0;
+                memo[a[i][j - 1]][a[i][j]] = 0;
+                memo[a[i][j]][a[i][j + 1]] = 0;
+                memo[a[i][j + 1]][a[i][j]] = 0;
+            }
+        }
+    }
+    int ans = 0;
+    REP(i, n){
+        REP(j, n){
+            // cout << memo[i][j];
+            if(i == j) continue;
+            ans+=memo[i][j];
+        }
+        // cout << endl;
+    }
+    cout << ans / 2 << endl;
+    return 0;
+}
diff --git a/src/abc303/B/metadata.json b/src/abc303/B/metadata.json
new file mode 100644
index 0000000..0ff214e
--- /dev/null
+++ b/src/abc303/B/metadata.json
@@ -0,0 +1,17 @@
+{
+ "code_filename": "main.cpp",
+ "judge": {
+  "judge_type": "normal"
+ },
+ "lang": "cpp",
+ "problem": {
+  "alphabet": "B",
+  "contest": {
+   "contest_id": "abc303"
+  },
+  "problem_id": "abc303_b"
+ },
+ "sample_in_pattern": "in_*.txt",
+ "sample_out_pattern": "out_*.txt",
+ "timeout_ms": 2000
+}
diff --git a/src/abc303/B/out_1.txt b/src/abc303/B/out_1.txt
new file mode 100644
index 0000000..0cfbf08
--- /dev/null
+++ b/src/abc303/B/out_1.txt
@@ -0,0 +1 @@
+2
diff --git a/src/abc303/B/out_2.txt b/src/abc303/B/out_2.txt
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/src/abc303/B/out_2.txt
@@ -0,0 +1 @@
+0
diff --git a/src/abc303/B/out_3.txt b/src/abc303/B/out_3.txt
new file mode 100644
index 0000000..1e8b314
--- /dev/null
+++ b/src/abc303/B/out_3.txt
@@ -0,0 +1 @@
+6
diff --git a/src/abc303/C/in_1.txt b/src/abc303/C/in_1.txt
new file mode 100644
index 0000000..7463b25
--- /dev/null
+++ b/src/abc303/C/in_1.txt
@@ -0,0 +1,4 @@
+4 2 3 1
+RUDL
+-1 -1
+1 0
diff --git a/src/abc303/C/in_2.txt b/src/abc303/C/in_2.txt
new file mode 100644
index 0000000..d3d54e0
--- /dev/null
+++ b/src/abc303/C/in_2.txt
@@ -0,0 +1,4 @@
+5 2 1 5
+LDRLD
+0 0
+-1 -1
diff --git a/src/abc303/C/main b/src/abc303/C/main
new file mode 100755
index 0000000..e7762f3
Binary files /dev/null and b/src/abc303/C/main differ
diff --git a/src/abc303/C/main.cpp b/src/abc303/C/main.cpp
new file mode 100644
index 0000000..83bba2a
--- /dev/null
+++ b/src/abc303/C/main.cpp
@@ -0,0 +1,60 @@
+ #include "bits/stdc++.h"
+
+using namespace std;
+
+#define sp(x) cout<<setprecision(x);
+#define FOR(i,a,b) for(int i=(a);i<(b);i++)
+#define REP(i,n) FOR(i,0,n)
+#define all(a) (a).begin(), (a).end()
+#define inf 10000000
+#define linf INT64_MAX*0.99
+#define print(s) cout<<(s)<<endl
+#define lint long long
+#define yes "Yes"
+#define no "No"
+
+typedef pair<int, int> P;
+
+int n, m, h, k;
+string s;
+map<P, int> ma;
+int main(){
+    ios::sync_with_stdio(false);
+    cin.tie(0);
+    cin>>n>>m>>h>>k;
+    cin>>s;
+    vector<int> a(n);
+    REP(i, n){
+        if(s[i] == 'R') a[i] = 0;
+        if(s[i] == 'L') a[i] = 1;
+        if(s[i] == 'U') a[i] = 2;
+        if(s[i] == 'D') a[i] = 3;
+    }
+
+    REP(i, m){
+        int x, y; cin>>x>>y;
+        ma[make_pair(x, y)] = 1;
+    }
+    int curx = 0, cury = 0;
+    int dx[4] = {1, -1, 0, 0};
+    int dy[4] = {0, 0, 1, -1};
+    int curh = h;
+    int flag = true;
+    REP(i, n){
+        curx += dx[a[i]], cury += dy[a[i]];
+        curh--;
+        // cout << curx << cury << endl;
+        if(curh < 0){
+            flag = false;
+            break;
+        } else {
+            if(ma[make_pair(curx, cury)] == 1 && curh < k){
+                curh = k;
+                ma[make_pair(curx, cury)] = 0;
+            }
+        }        
+    }
+    if(flag) cout << "Yes" << endl;
+    else cout << "No" << endl;
+    return 0;
+}
diff --git a/src/abc303/C/metadata.json b/src/abc303/C/metadata.json
new file mode 100644
index 0000000..c722a26
--- /dev/null
+++ b/src/abc303/C/metadata.json
@@ -0,0 +1,17 @@
+{
+ "code_filename": "main.cpp",
+ "judge": {
+  "judge_type": "normal"
+ },
+ "lang": "cpp",
+ "problem": {
+  "alphabet": "C",
+  "contest": {
+   "contest_id": "abc303"
+  },
+  "problem_id": "abc303_c"
+ },
+ "sample_in_pattern": "in_*.txt",
+ "sample_out_pattern": "out_*.txt",
+ "timeout_ms": 2000
+}
diff --git a/src/abc303/C/out_1.txt b/src/abc303/C/out_1.txt
new file mode 100644
index 0000000..dcd7a5d
--- /dev/null
+++ b/src/abc303/C/out_1.txt
@@ -0,0 +1 @@
+Yes
diff --git a/src/abc303/C/out_2.txt b/src/abc303/C/out_2.txt
new file mode 100644
index 0000000..cf45697
--- /dev/null
+++ b/src/abc303/C/out_2.txt
@@ -0,0 +1 @@
+No
diff --git a/src/abc303/D/in_1.txt b/src/abc303/D/in_1.txt
new file mode 100644
index 0000000..7404c5e
--- /dev/null
+++ b/src/abc303/D/in_1.txt
@@ -0,0 +1,2 @@
+1 3 3
+AAaA
diff --git a/src/abc303/D/in_2.txt b/src/abc303/D/in_2.txt
new file mode 100644
index 0000000..2c7b90a
--- /dev/null
+++ b/src/abc303/D/in_2.txt
@@ -0,0 +1,2 @@
+1 1 100
+aAaAaA
diff --git a/src/abc303/D/in_3.txt b/src/abc303/D/in_3.txt
new file mode 100644
index 0000000..67fac56
--- /dev/null
+++ b/src/abc303/D/in_3.txt
@@ -0,0 +1,2 @@
+1 2 4
+aaAaAaaAAAAaAaaAaAAaaaAAAAA
diff --git a/src/abc303/D/main b/src/abc303/D/main
new file mode 100755
index 0000000..a5055bd
Binary files /dev/null and b/src/abc303/D/main differ
diff --git a/src/abc303/D/main.cpp b/src/abc303/D/main.cpp
new file mode 100644
index 0000000..5047e62
--- /dev/null
+++ b/src/abc303/D/main.cpp
@@ -0,0 +1,68 @@
+#include "bits/stdc++.h"
+
+using namespace std;
+
+#define sp(x) cout << setprecision(x);
+#define FOR(i, a, b) for (int i = (a); i < (b); i++)
+#define REP(i, n) FOR(i, 0, n)
+#define all(a) (a).begin(), (a).end()
+#define linf INT64_MAX * 0.99
+#define print(s) cout << (s) << endl
+#define lint long long
+#define yes "Yes"
+#define no "No"
+template <class T>
+inline bool chmin(T &a, T b)
+{
+    if (a > b)
+    {
+        a = b;
+        return true;
+    }
+    return false;
+}
+template <class T>
+inline bool chmax(T &a, T b)
+{
+    if (a < b)
+    {
+        a = b;
+        return true;
+    }
+    return false;
+}
+
+typedef pair<int, int> P;
+
+int main()
+{
+    ios::sync_with_stdio(false);
+    cin.tie(0);
+    lint x, y, z;
+    cin >> x >> y >> z;
+    string s;
+    cin >> s;
+    lint dp[s.length() + 1][2];
+    REP(i, s.length() + 1)
+    REP(j, 2) dp[i][j] = linf;
+    REP(i, s.length() + 1)
+    dp[0][0] = 0;
+    REP(i, s.length())
+    {
+        chmin(dp[i][0], dp[i][1] + z);
+        chmin(dp[i][1], dp[i][0] + z);
+
+        if (s[i] == 'a')
+        {
+            chmin(dp[i + 1][0], dp[i][0] + x);
+            chmin(dp[i + 1][1], dp[i][1] + y);
+        }
+        else
+        {
+            chmin(dp[i + 1][0], dp[i][0] + y);
+            chmin(dp[i + 1][1], dp[i][1] + x);
+        }
+    }
+    cout << min(dp[s.length()][0], dp[s.length()][1]) << endl;
+    return 0;
+}
diff --git a/src/abc303/D/metadata.json b/src/abc303/D/metadata.json
new file mode 100644
index 0000000..b67b4f3
--- /dev/null
+++ b/src/abc303/D/metadata.json
@@ -0,0 +1,17 @@
+{
+ "code_filename": "main.cpp",
+ "judge": {
+  "judge_type": "normal"
+ },
+ "lang": "cpp",
+ "problem": {
+  "alphabet": "D",
+  "contest": {
+   "contest_id": "abc303"
+  },
+  "problem_id": "abc303_d"
+ },
+ "sample_in_pattern": "in_*.txt",
+ "sample_out_pattern": "out_*.txt",
+ "timeout_ms": 2000
+}
diff --git a/src/abc303/D/out_1.txt b/src/abc303/D/out_1.txt
new file mode 100644
index 0000000..ec63514
--- /dev/null
+++ b/src/abc303/D/out_1.txt
@@ -0,0 +1 @@
+9
diff --git a/src/abc303/D/out_2.txt b/src/abc303/D/out_2.txt
new file mode 100644
index 0000000..1e8b314
--- /dev/null
+++ b/src/abc303/D/out_2.txt
@@ -0,0 +1 @@
+6
diff --git a/src/abc303/D/out_3.txt b/src/abc303/D/out_3.txt
new file mode 100644
index 0000000..425151f
--- /dev/null
+++ b/src/abc303/D/out_3.txt
@@ -0,0 +1 @@
+40