Submission #1006079

#TimeUsernameProblemLanguageResultExecution timeMemory
1006079devariaotaCollecting Mushrooms (NOI18_collectmushrooms)C++17
100 / 100
34 ms48732 KiB
#include <bits/stdc++.h> using namespace std; #define int long long #define fi first #define se second #define pb push_back #define pii pair<int, int> #define all(x) x.begin(), x.end() bool ckmin(int& a, int b){return b < a ? a = b, 1 : 0;} bool ckmax(int& a, int b){return b > a ? a = b, 1 : 0;} const int N = 2e5 + 5, mod = 1e9 + 7; signed main(){ ios_base::sync_with_stdio(0), cin.tie(0); int n, m, d, s; cin >> n >> m >> d >> s; int p[n + 2][m + 2], p2[n + 2][m + 2]; char g[n + 2][m + 2]; int l[n + 2][m + 2], r[n + 2][m + 2]; memset(l, 0, sizeof(l)); memset(r, 0, sizeof(r)); memset(p, 0, sizeof(p)); memset(p2, 0, sizeof(p2)); for(int i = 1; i <= n; i++) { for(int j = 1; j <= m; j++) { cin >> g[i][j]; if(g[i][j] == 'S') { int i1 = max((int)1, i - d), i2 = min(n + 1, i + d + 1), j1 = max((int)1, j - d), j2 = min(m + 1, j + d + 1); l[i1][j1]++, l[i2][j1]--, l[i1][j2]--, l[i2][j2]++; } } } int ans = 0; for(int i = 1; i <= n; i++) { for(int j = 1; j <= m; j++) { l[i][j] = l[i - 1][j] + l[i][j - 1] - l[i - 1][j - 1] + l[i][j]; if(g[i][j] == 'M' && l[i][j] >= s) ans++; } } cout << ans << endl; }
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