Submission #656269

#	Time	Username	Problem	Language	Result	Execution time	Memory
656269		Dec0Dedd	Dango Maker (JOI18_dango_maker)	C++14	13 / 100	11 ms	9180 KiB

dango_maker

#include <bits/stdc++.h>

using namespace std;

const int N = 3e3+1;

string S = "RGW";

char c[N][N], tmp[N][N];
bool us[N][N];
int n, m;

void rot90() {
   for (int i=1; i<=n; ++i) {
      for (int j=1; j<=m; ++j) tmp[j][n-i+1]=c[i][j];
   } swap(n, m);

   for (int i=1; i<=n; ++i) {
      for (int j=1; j<=m; ++j) c[i][j]=tmp[i][j];
   }
}

bool ver(int i, int j) {
   if (m-j+1 < 3) return false;
   for (int k=0; k<3; ++k) {
      if (c[i][j+k] != S[k] || us[i][j+k]) return false;
   }
   return true;
}

bool hor(int i, int j) {
   if (n-i+1 < 3) return false;
   for (int k=0; k<3; ++k) {
      if (c[i+k][j] != S[k] || us[i+k][j]) return false;
   }
   return true;
}

int solve() {
   int ans=0;
   memset(us, false, sizeof(us));

   for (int i=1; i<=n; ++i) {
      for (int j=1; j<=n; ++j) {
         if (ver(i, j)) {
            for (int k=0; k<3; ++k) us[i][j+k]=true;
            ++ans;
         } else if (hor(i, j)) {
            for (int k=0; k<3; ++k) us[i+k][j]=true;
            ++ans;
         }
      }
   }

   return ans;
}

int main() {
   ios_base::sync_with_stdio(0);
   cin.tie(NULL);
   cout.tie(NULL);
   
   cin>>n>>m;
   for (int i=1; i<=n; ++i) {
      for (int j=1; j<=m; ++j) cin>>c[i][j]; 
   }

   int k=4, ans=0;
   while (k--) {
      ans=max(ans, solve());
      rot90();
   }

   cout<<ans<<"\n";
}

• Subtask 1: 13 / 13
• Subtask 2: 0 / 20
• Subtask 3: 0 / 67