'commit'

TangDou/CSP-J/AcWingTraining/T5/stop.cpp

@@ -0,0 +1,17 @@
+#include<bits/stdc++.h>
+using namespace std;
+typedef long long ll;
+const int N = 40;
+ll c[N][N];
+int main(){
+    for(int i = 0; i < N; i++){
+        for(int j = 1; j <= i; j++)
+        if(!j)c[i][j] = 1;
+        else
+            c[i][j] = c[i-1][j] + c[i-1][j-1];
+    }
+    int n; 
+    cin >> n;
+    cout << c[n*2][n]/(n+1) << endl;
+    return 0;
+}