Submission #1128313

#	Time	Username	Problem	Language	Result	Execution time	Memory
1128313		atillama	Red-blue table (IZhO19_stones)	C++20	0 / 100	20 ms	1348 KiB

stones

#pragma GCC optimize("O3")
#include <bits/stdc++.h>

using namespace std;

#define int long long
#define double long double
#define fastio ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)

const double eps = 1e-9;
const int mod = 1e9 + 7;
const int N = 1e3 + 5;

signed main(){
    fastio;
    int t;
    cin >> t;
    while(t--){
        int n, m;
        cin >> n >> m;
        if(n <= m / 2){
            vector<vector<char>> arr(n, vector<char>(m, '-'));
            cout << m << '\n';
            for(int i = 0; i < n; i++){
                for(int j = 0; j < m; j++){
                    cout << arr[i][j];
                }
                cout << '\n';
            }
            continue;
        }
        if(n / 2 >= m){
            vector<vector<char>> arr(n, vector<char>(m, '+'));
            cout << n << '\n';
            for(int i = 0; i < n; i++){
                for(int j = 0; j < m; j++){
                    cout << arr[i][j];
                }
                cout << '\n';
            }
            continue;
        }
        if(n <= m){
            vector<vector<char>> arr(n, vector<char>(m, '-'));
            vector<pair<int, int>> setirler(n, {m, 0}); // - lerin sayi, + lerin sayi
            vector<pair<int, int>> sutunlar(m, {n, 0});
            for(int i = 0; i < n; i++){
                for(int j = 0; j < m; j++){
                    if(setirler[i].first >= setirler[i].second && sutunlar[j].first - 2 > sutunlar[j].second){
                        arr[i][j] = '+';
                        setirler[i].first--;
                        setirler[i].second++;
                        sutunlar[j].first--;
                        sutunlar[j].second++;
                    }
                }
            }
            int ans = 0;
            for(int i = 0; i < n; i++){
                if(setirler[i].first < setirler[i].second){
                    ans++;
                }
            }
            for(int j = 0; j < m; j++){
                if(sutunlar[j].first > sutunlar[j].second){
                    ans++;
                }
            }
            cout << ans << '\n';
            for(int i = 0; i < n; i++){
                for(int j = 0; j < m; j++){
                    cout << arr[i][j];
                }
                cout << '\n';
            }
        }else{
            vector<vector<char>> arr(n, vector<char>(m, '+'));
            vector<pair<int, int>> setirler(n, {0, m}); // - lerin sayi, + lerin sayi
            vector<pair<int, int>> sutunlar(m, {0, n});
            for(int i = 0; i < n; i++){
                for(int j = 0; j < m; j++){
                    if(sutunlar[j].first >= sutunlar[j].second && setirler[i].second - 1 > setirler[i].first){
                        arr[i][j] = '-';
                        setirler[i].second--;
                        setirler[i].first++;
                        sutunlar[j].second--;
                        sutunlar[j].first++;
                    }
                }
            }
            int ans = 0;
            for(int i = 0; i < n; i++){
                if(setirler[i].second > setirler[i].first){
                    ans++;
                }
            }
            for(int j = 0; j < m; j++){
                if(sutunlar[j].first > sutunlar[j].second){
                    ans++;
                }
            }
            cout << ans << '\n';
            for(int i = 0; i < n; i++){
                for(int j = 0; j < m; j++){
                    cout << arr[i][j];
                }
                cout << '\n';
            }
        }
    }
}

/*
    freopen("x.in", "r", stdin);
    freopen("x.out", "w", stdout);
*/

//atilla

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