Submission #1183781

#	Time	Username	Problem	Language	Result	Execution time	Memory
1183781		asdfghjk	Red-blue table (IZhO19_stones)	C++20	17 / 100	2095 ms	724 KiB

stones

#include <bits/stdc++.h>
#define pb push_back
#define all(x) x.begin(), x.end()
#define F first
#define S second
#define con continue
using  namespace std;
typedef long long ll;
typedef double db;
typedef long double ld;
const ll N = 1000 + 5;
const ll inf = 1e9;
const ll INF = 1e18;
const ll MOD = 1e9 + 7;
int a[N][N];
void solve(){
    int n,m;cin >> n >> m;
    int mx = 0,id = 0;
    for(int mask = 0;mask < (1 << (n * m));mask++){
        for(int i = 0;i < n;i++){
            for(int j = 0;j < m;j++){
                int ord = (i * m) + j;
                a[i][j] = ((mask >> ord) & 1);
            }
        }
        // 0=red,1=blue
        int sum = 0;
        for(int i = 0;i < n;i++){
            int amo = 0;
            for(int j = 0;j < m;j++){
                if(a[i][j] == 0)amo++;
            }
            if(amo > m - amo){
                sum++;
            }
        }
        for(int i = 0;i < m;i++){
            int amo = 0;
            for(int j = 0;j < n;j++){
                if(a[j][i] == 1)amo++;
            }
            if(amo > n - amo)sum++;
        }
        if(mx < sum){
            mx = sum;
            id = mask;
        }
    }
    cout << mx << '\n';
    for(int i = 0;i < n;i++){
        for(int j = 0;j < m;j++){
            int ord = (i * m) + j;
            if(((id >> ord) & 1) == 1){
                cout << '-';
            }
            else cout << '+';
        }
        cout << '\n';
    }
}
main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int t;cin >> t;
    while(t--){
        solve();
    }
}

Compilation message (stderr)

stones.cpp:61:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   61 | main(){
      | ^~~~

• Subtask 1: 17 / 17
• Subtask 2: 0 / 10
• Subtask 3: 0 / 16
• Subtask 4: 0 / 11
• Subtask 5: 0 / 15
• Subtask 6: 0 / 31