Submission #330836

#	Time	Username	Problem	Language	Result	Execution time	Memory
330836		vitkishloh228	Red-blue table (IZhO19_stones)	C++14	0 / 100	58 ms	1644 KiB

stones

#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
int n, m;
int calc(vector<vector<int>>& a) {
    int cur = 0;
    for (int i = 0; i < n; ++i) {
        int x = 0;
        for (int j = 0; j < m; ++j) {
            if (a[i][j]) x++;
            else x--;
        }
        if (x > 0) cur++;
    }
    for (int j = 0; j < m; ++j) {
        int x = 0;
        for (int i = 0; i < n; ++i) {
            if (a[i][j]) x++;
            else x--;
        }
        if (x < 0) cur++;
    }
    return cur;
}
int main() {
    int tt;
    cin >> tt;
    while (tt--) {
        cin >> n >> m;
        if (n == 1) {
            cout << m << '\n';
            for (int i = 0; i < m; ++i) {
                cout << "-";
            }
            cout << '\n';
            continue;
        }
        if (m == 1) {
            cout << n << '\n';
            for (int i = 0; i < n; ++i) {
                cout << "+\n";
            }
            cout << '\n';
            continue;
        }
       // cout << (n + m - 2 - (1 - n % 2) - (1 - m % 2)) << '\n';
        int l;
        if (m % 2 == 0) l = (m + 2) / 2;
        else l = (m + 1) / 2;
        int it = 0;
        vector<vector<int>> ans(n, vector<int>(m));
        vector<int> cnt(m);
        for (int i = 0; i < n; ++i) {
            int max1 = 0;
            for (int j = 0; j < m; ++j) {
                max1 = max(max1, cnt[j]);
            }
            if (n % 2 == 1) {
                if (max1 >= (n - 1) / 2) break;
            }
            else if (max1 >= (n-2) / 2) break;
            for (int j = 0; j < l; ++j) {
                ans[i][it] = 1;
                cnt[it]++;
                it = (it + 1) % m;
            }
            max1 = 0;
            for (int j = 0; j < m; ++j) {
                max1 = max(max1, cnt[j]);
            }
            if (n % 2 == 1) {
                if (max1 >= (n - 1) / 2) break;
            }
            else if (max1 >= (n-2) / 2) break;
        }
        cout << calc(ans) << '\n';
        for (auto e : ans) {
            for (auto u : e) {
                if (u) cout << "+";
                else cout << "-";
            }
            cout << '\n';
        }
    }
}

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