Submission #1005996

#	Time	Username	Problem	Language	Result	Execution time	Memory
1005996		christinelynn	Collecting Mushrooms (NOI18_collectmushrooms)	C++17	0 / 100	2057 ms	15948 KiB

mushrooms

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define endl "\n"


signed main(){
    ios_base::sync_with_stdio(0); cin.tie(0);

    int n, m, d, s; 

    map < pair < int, int >, int > mp;

    vector < int > freq ( n * m + 5, 0);

    cin >> n >> m >> d >> s;

    string grid[n + 1];

    int cnt = 1;

    for ( int i = 0; i < n; i++) cin >> grid[i];

    vector < pair < int, int > > tanaman, sprinkle;

    for ( int i = 0; i < n; i++){
        for ( int j = 0; j < m; j++){
            if ( grid[i][j] == 'M' ){
                tanaman.push_back({i, j});
                mp[{i, j}] = cnt;
                cnt++;
            }
            if ( grid[i][j] == 'S' ){
                sprinkle.push_back({i, j});
            } 

        }
    }

    for ( int i = 0; i < tanaman.size(); i++){
        for ( int j = 0; j < sprinkle.size(); j++){
            int x1 = tanaman[i].first, y1 = tanaman[i].second;
            int x2 = sprinkle[j].first, y2 = sprinkle[j].second;

            if ( max ( abs ( x1 - x2), abs ( y1 - y2)) <= d ){
                freq[mp[{x1, y1}]]++;
            }
        }
    }

    int ans = 0;

    for ( int i = 1; i < freq.size(); i++){
        ans += ( freq[i] >= s );
    }

    cout << ans << endl;
}

Compilation message (stderr)

mushrooms.cpp: In function 'int main()':
mushrooms.cpp:40:24: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |     for ( int i = 0; i < tanaman.size(); i++){
      |                      ~~^~~~~~~~~~~~~~~~
mushrooms.cpp:41:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |         for ( int j = 0; j < sprinkle.size(); j++){
      |                          ~~^~~~~~~~~~~~~~~~~
mushrooms.cpp:53:24: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |     for ( int i = 1; i < freq.size(); i++){
      |                      ~~^~~~~~~~~~~~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 10
• Subtask 3: 0 / 18
• Subtask 4: 0 / 23
• Subtask 5: 0 / 19
• Subtask 6: 0 / 21