update

src/P2822/P2822_prefix.cpp

@@ -11,7 +11,7 @@ static void init(){
     c[0][0] = c[1][0] = c[1][1] = 1;
     for(ull i {2};i<max_n;i++){
         c[i][0]=1;
-        for(ull j{1};j<max_n;j++){
+        for(ull j{1};j<=i;j++){
             c[i][j] = (c[i-1][j-1] + c[i-1][j])%k;
         }
     }
@@ -23,11 +23,16 @@ static void init(){
     }
 }
 
+#define NV(v)#v<<" : "<<(v)
+
 int main(){
     std::cin>>t>>k;
+    std::cout<<NV(t)<<'\n'<<NV(k)<<'\n';
     init();
     for(ull i {0};i<t;i++){
+        std::cout<<NV(t)<<'\n'<<NV(k)<<'\n';
         std::cin>>n>>m;
+        std::cout<<"test\n";
         m = std::min(m,n);
         std::cout<<(prefix[n][m])<<'\n';
     }