Submission #874399

#	Time	Username	Problem	Language	Result	Execution time	Memory
874399		tvladm2009	Red-blue table (IZhO19_stones)	C++17	100 / 100	10 ms	1376 KiB

stones

#include <bits/stdc++.h>

using i64 = long long;

bool check(int red, int blue, int n, int m) {
    if (red == 0 || blue == 0) {
        return true;
    }
    int part = std::max(0, (m + 2) / 2 - (m - blue));
    int part2 = std::max(0, (n + 2)/ 2 - (n - red));

    if (part <= blue) {
        int slots = (part * red + blue - 1) / blue;
        if (slots + part2 <= red) {
            return true;
        }
    }
    return false;
}

void solve() {
    int n, m;
    std::cin >> n >> m;
    int x = 0, y = 0;
    for (int i = 0; i <= n; i++) {
        for (int j = 0; j <= m; j++) {
            if (check(i, j, n, m) == true && x + y < i + j) {
                x = i;
                y = j;
            }
        }
    }
    std::cout << x + y << "\n";
    int col = 0;
    int part = std::max(0, (m + 2) / 2 - (m - y));
    for (int i = 0; i < x; i++) {
        std::string s;
        s.resize(m);
        for (int j = 0; j < m; j++) {
            s[j] = '-';
        }
        for (int j = 0; j < part; j++) {
            s[col] = '+';
            col = (col + 1) % y;
        }
        for (int j = y; j < m; j++) {
            s[j] = '+';
        }
        std::cout << s << "\n";
    }
    for (int i = x; i < n; i++) {
        std::string s;
        s.resize(m);
        for (int j = 0; j < m; j++) {
            s[j] = '-';
        }
        std::cout << s << "\n";
    }
}

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);

    int T;
    std::cin >> T;

    while (T--) {
        solve();
    }

    return 0;
}

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