oj.uz

Submission #168774

# Submission time Handle Problem Language Result Execution time Memory
168774 2019-12-16T08:27:13 Z ptreap Red-blue table (IZhO19_stones) C++14
17 / 100
 2000 ms 376 KB 
#include <iostream>
#include <vector>
#include <algorithm>
#include <set>
#include <unordered_set>
#include <map>
#include <unordered_map>
#include <string>
#include <cmath>
#include <iomanip>
#include <stdio.h>
#include <ctime>
#include <fstream>
#include <chrono>
#define _GLIBCXX_DEBUG
#define int long long
#define double long double
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define sz(x) (int)x.size()
#define pb push_back;
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("no-stack-protector")
#pragma GCC target("sse,sse2,sse3,ssse3,popcnt,abm,mmx,tune=native")
#pragma GCC optimize("fast-math")
#pragma GCC optimize "-O3"
typedef int supertype;


using namespace std;


vector <vector <bool>> generate(int mask, int n, int m) {
    vector <vector <bool>> ans(n, vector <bool>(m));
    int cut = (1LL << n) - 1;
    for (int i = 0; i < n; i++) {
        int nowString = mask >> (i * m) & cut;
        for (int j = 0; j < m; j++) {
            ans[n - i - 1][m - j - 1] = nowString >> j & 1;
        }
    }
    return ans;
}


void print(vector <vector <bool>>& ans) {
    for (int i = 0; i < ans.size(); i++) {
        for (int j = 0; j < ans[i].size(); j++) {
            if (ans[i][j])
                cout << '+';
            else
                cout << '-';
        }
        cout << endl;
    }
}


void solve() {
    int n, m;
    cin >> n >> m;
    int best = 0, bestmask = 0;
    for (int mask = 0; mask < (1LL << (n * m)); mask++) {
        auto now = generate(mask, n, m);
        int a = 0, b = 0;
        for (int i = 0; i < n; i++) {
            int red = 0;
            for (int j = 0; j < m; j++) {
                if (now[i][j])
                    red++;
            }
            if (red > m - red)
                a++;
        }
        for (int j = 0; j < m; j++) {
            int blue = 0;
            for (int i = 0; i < n; i++) {
                if (!now[i][j])
                    blue++;
            }
            if (blue > n - blue)
                b++;
        }
        if (a + b > best) {
            best = a + b;
            bestmask = mask;
        }
    }
    cout << best << endl;
    auto ans = generate(bestmask, n, m);
    print(ans);
}


signed main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    srand(time(NULL));
    //freopen("sort.in", "r", stdin);
    //freopen("sort.in", "r", stdin);

    //int n, m, mask;
    //cin >> n >> m >> mask;
    //print(generate(mask, n, m));
    int tests = 1;
    cin >> tests;
    while (tests--) {
        solve();
    }

    return 0;
}


/*

*/

Compilation message

stones.cpp: In function 'void print(std::vector<std::vector<bool> >&)':
stones.cpp:48:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < ans.size(); i++) {
                     ~~^~~~~~~~~~~~
stones.cpp:49:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int j = 0; j < ans[i].size(); j++) {
                         ~~^~~~~~~~~~~~~~~

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 33 ms 376 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2066 ms 248 KB Time limit exceeded

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 33 ms 376 KB Output is correct
3 Execution timed out 2066 ms 248 KB Time limit exceeded

Subtask #4
0 / 11.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2064 ms 376 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 15.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2065 ms 376 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 33 ms 376 KB Output is correct
3 Execution timed out 2066 ms 248 KB Time limit exceeded