Submission #683718

#	Time	Username	Problem	Language	Result	Execution time	Memory
683718		NintsiChkhaidze	Red-blue table (IZhO19_stones)	C++14	27 / 100	24 ms	2388 KiB

stones

#include <bits/stdc++.h>
#define ll long long
#define s second
#define pb push_back
#define f first
#define left (h<<1),l,((l+r)>>1)
#define right ((h<<1)|1),((l+r)>>1) + 1,r
#define pii pair<int,int>
// #define int ll // ? 
using namespace std;

const int N = 1005,mod = 1000000007; // ?
int a[N][N],y[N],x[N],f[N],b[N][N];
int ans,n,m;

void solve(){
    // if (m >= n){
        for (int i = 1; i <= n; i++)
            for (int j = 1; j <= m; j++)
                a[i][j] = 0;
        //column-ebs ar vapucheb
        int ans1 = m; int k = m/2 + 1;
        
        for (int j = 1; j <= m; j++) y[j] = n - n/2 - 1;
        for (int i = 1; i <= n; i++){
            int cnt = 0;
            for (int j = 1; j <= m; j++) f[j] = 0;
            for (int j = 1; j <= m; j++){
                if (y[j]) {
                    --y[j];
                    f[j] = 1;
                    cnt++;
                }
                if (cnt == k) {
                    ++ans1;
                    break;
                }
            }
            if (cnt < k) break;

            for (int j = 1; j <= m; j++)
                if (f[j]) a[i][j] = 1;
        }
    // }
    //n > m
    //row-ebs ar vapucheb
    for (int i = 1; i <= n; i++)
        for (int j = 1; j <= m; j++)
            b[i][j] = 1;

    int ans2 = n; k = n/2 + 1;
    for (int i = 1; i <= n; i++) x[i] = m - m/2 - 1;

    for (int j = 1; j <= m; j++){
        int cnt=0;
        for (int i = 1; i <= n; i++) f[i] = 0;
        for (int i = 1; i <= n; i++){
            if (x[i]){
                --x[i];
                f[i] = 1;
                ++cnt;
            }
            if (cnt == k) {
                ++ans2;
                break;
            }
        }
        if (cnt < k) break;

        for (int i = 1; i <= n; i++){
            if (f[i]) b[i][j] = 0;
        }
    }

    if (ans2 > ans1){
        for (int i = 1; i <= n; i++)
            for (int j =1; j <= m; j++)
                a[i][j] = b[i][j];
        ans = ans2;
    }else{
        ans = ans1;
    }
}
signed main (){
    ios_base::sync_with_stdio(0),cin.tie(NULL),cout.tie(NULL);

    int T;
    cin>>T;

    while (T--){
        cin>>n>>m;
        solve();
        cout<<ans<<endl;
        for (int i = 1; i <= n; i++){
            for (int j = 1; j <= m; j++){
                if (a[i][j]) cout<<"+";
                else cout<<"-";
            }
            cout<<"\n";
        }
        
    }
}

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