Submission #654292

#	Time	Username	Problem	Language	Result	Execution time	Memory
654292		lunchbox1	Dango Maker (JOI18_dango_maker)	C++17	0 / 100	1 ms	340 KiB

dango_maker

/*
 Dango Maker
 https://oj.uz/problem/view/JOI18_dango_maker
*/
#include <bits/stdc++.h>
using namespace std;

const int N = 3e3;

int main() {
 ios::sync_with_stdio(0), cin.tie(0);
 int n, m; cin >> n >> m;
 static string s[N];
 for (int i = 0; i < n; i++) cin >> s[i];
 static int f[N][3];
 int ans = 0;
 for (int k = 0; k < n + m - 1; k++) {
  int p = -1;
  for (int i = 0; i < n; i++) {
   int j = k - i;
   if (j < 0 || j >= m) continue;
   f[i][0] = f[i][1] = f[i][2] = 0;
   if (p == -1) {
    if (j > 0 && j < m - 1 && s[i][j - 1] == 'R' && s[i][j] == 'G' && s[i][j + 1] == 'W')
     f[i][1] = 1;
    if (i > 0 && i < n - 1 && s[i - 1][j] == 'R' && s[i][j] == 'G' && s[i + 1][j] == 'W')
     f[i][2] = 1;
   } else {
    assert(p == i - 1);
    f[i][0] = max({f[p][0], f[p][1], f[p][2]});
    if (j > 0 && j < m - 1 && s[i][j - 1] == 'R' && s[i][j] == 'G' && s[i][j + 1] == 'W')
     f[i][1] = max(f[p][0], f[p][2]) + 1;
    if (i > 0 && i < n - 1 && s[i - 1][j] == 'R' && s[i][j] == 'G' && s[i + 1][j] == 'W')
     f[i][2] = max(f[p][0], f[p][1]) + 1;
   }
   p = i;
  }
  ans += max({f[p][0], f[p][1], f[p][2]});
 }
 cout << ans << '\n';
 return 0;
}

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