Submission #342483

#	Time	Username	Problem	Language	Result	Execution time	Memory
342483		dxz05	Red-blue table (IZhO19_stones)	C++14	17 / 100	24 ms	384 KiB

stones

//#pragma GCC optimize("Ofast")

#include <bits/stdc++.h>

using namespace std;

void debug_out() { cerr << endl; }

template<typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
    cerr << "[" << H << "]";
    debug_out(T...);
}

#ifdef dddxxz
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#else
#define debug(...) 42
#endif

#define SZ(s) ((int)s.size())

clock_t startTime;

double getCurrentTime() {
    return (double) (clock() - startTime) / CLOCKS_PER_SEC;
}

typedef long long ll;
//mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
const double eps = 0.00001;
const int MOD = 1e9 + 7;
const int INF = 1000000101;
const long long LLINF = 1223372000000000555;
const int N = 2e6 + 4e4;
const int M = 1234;
const int LOG = 19;

int calc(vector<vector<char>> &v) {
    int n = v.size(), m = v[0].size();
    int res = 0;
    for (int i = 0; i < n; i++) {
        int x = 0, y = 0;
        for (int j = 0; j < m; j++) {
            if (v[i][j] == '+') x++;
            else
                y++;
        }
        if (x > y) res++;
    }
    for (int j = 0; j < m; j++) {
        int x = 0, y = 0;
        for (int i = 0; i < n; i++) {
            if (v[i][j] == '-') x++;
            else
                y++;
        }
        if (x > y) res++;
    }

    return res;
}

void solve(int TC) {
    int n, m;
    cin >> n >> m;

    if (n > 4 || m > 4) return;

    vector<vector<char>> ans;
    int best = 0;

    for (int mask = 0; mask < (1 << (n * m)); mask++) {
        vector<vector<char>> v(n);
        for (int i = 0; i < n; i++) {
            v[i].resize(m);
            ll cur = mask >> (m * i);
            for (int j = 0; j < m; j++) {
                if (cur & (1 << j)) v[i][j] = '+';
                else
                    v[i][j] = '-';
            }
        }

        if (calc(v) > best) best = calc(v), ans = v;
    }

    cout << best << endl;

    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            cout << ans[i][j];
        }
        cout << endl;
    }


}

int main() {
    startTime = clock();
    ios_base::sync_with_stdio(false);

    bool llololcal = false;
#ifdef dddxxz
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    llololcal = true;
#endif

    int TC = 1;
    cin >> TC;

    for (int test = 1; test <= TC; test++) {
        debug(test);
        solve(test);
    }

    if (llololcal) cerr << endl << "Time: " << getCurrentTime() * 1000 << " ms" << endl;

    return 0;
}

Compilation message (stderr)

stones.cpp: In function 'int main()':
stones.cpp:18:20: warning: statement has no effect [-Wunused-value]
   18 | #define debug(...) 42
      |                    ^~
stones.cpp:115:9: note: in expansion of macro 'debug'
  115 |         debug(test);
      |         ^~~~~

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