oj.uz

Submission #925569

# Submission time Handle Problem Language Result Execution time Memory
925569 2024-02-12T05:20:12 Z vjudge1 Collecting Mushrooms (NOI18_collectmushrooms) C++17
100 / 100
 13 ms 9260 KB 
// #pragma GCC target ("avx2")
// #pragma GCC optimization ("O3")
// #pragma GCC optimization ("unroll-loops")

#include <bits/stdc++.h>

#define int long long
#define ff first
#define ss second
#define pb push_back
#define yes cout<<"Yes\n"
#define no cout<<"No\n"
#define no1 cout<<"-1\n"

using namespace std;

const int N = 2e5+10;
const int M = 2e5+100;
const int INF = 1e18;
const int mod = 998244353;
  
// int binpow (int a, int n) {
// 	if (n == 0)
// 		return 1;
// 	if (n % 2 == 1)
// 		return (binpow (a, n-1) * a)%mod;
// 	else {
// 		int b = binpow (a, n/2) % mod;
// 		return (b * b)%mod;
// 	}
// }

int n,m,d,k;

void solve(){
    cin>>n>>m>>d>>k;
    char a[n+1][m+1];
    int b[n+1][m+1];
    for(int i = 1;i<=n;i++){
        for(int j = 1;j<=m;j++){
            b[i][j] = 0;
        }
    }
    for(int i = 1;i<=n;i++){
        for(int j = 1;j<=m;j++){
            cin>>a[i][j];
            if(a[i][j] == 'S'){
                int x1 = max(1ll,i-d);
                int y1 = max(1ll,j-d);
                int x2 = min(n,i+d);
                int y2 = min(m,j+d);
                b[x1][y1]++;
                if(x2 + 1 <= n){
                    b[x2 + 1][y1]--;
                }
                if(y2 + 1 <= m){
                    b[x1][y2 + 1]--;
                }
                if(x2 + 1 <= n && y2 + 1 <= m){
                    b[x2 + 1][y2 + 1]++;
                }
            }
        }
    }
    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= m; j++){
            if(i > 1){
                b[i][j] += b[i - 1][j];
            }
            if(j > 1){
                b[i][j] += b[i][j - 1];
            }
            if(i > 1 && j > 1){
                b[i][j] -= b[i - 1][j - 1];
            }
        }
    }
    int ans = 0;
    for(int i = 1;i<=n;i++){
        for(int j = 1;j<=m;j++){
            if(a[i][j] == 'M' && b[i][j]>=k) ans++;
        }
    }
    cout<<ans<<'\n';
}

signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(nullptr);
    // cout.tie(nullptr);
    int t = 1; 
    // cin>>t;
    //   cout<<"";
    for(int i = 1;i<=t;i++){
        solve();
        // cout<<'\n';
    }
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct

Subtask #4
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 2136 KB Output is correct
2 Correct 4 ms 2140 KB Output is correct
3 Correct 4 ms 2652 KB Output is correct
4 Correct 4 ms 2140 KB Output is correct
5 Correct 4 ms 2140 KB Output is correct

Subtask #5
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 9052 KB Output is correct
2 Correct 11 ms 9048 KB Output is correct
3 Correct 12 ms 9048 KB Output is correct
4 Correct 13 ms 9260 KB Output is correct
5 Correct 12 ms 9252 KB Output is correct

Subtask #6
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 5 ms 2136 KB Output is correct
17 Correct 4 ms 2140 KB Output is correct
18 Correct 4 ms 2652 KB Output is correct
19 Correct 4 ms 2140 KB Output is correct
20 Correct 4 ms 2140 KB Output is correct
21 Correct 12 ms 9052 KB Output is correct
22 Correct 11 ms 9048 KB Output is correct
23 Correct 12 ms 9048 KB Output is correct
24 Correct 13 ms 9260 KB Output is correct
25 Correct 12 ms 9252 KB Output is correct
26 Correct 10 ms 4700 KB Output is correct
27 Correct 10 ms 5212 KB Output is correct
28 Correct 11 ms 5212 KB Output is correct
29 Correct 11 ms 5212 KB Output is correct
30 Correct 11 ms 5208 KB Output is correct