oj.uz

Submission #169412

# Submission time Handle Problem Language Result Execution time Memory
169412 2019-12-20T09:12:37 Z SamAnd Red-blue table (IZhO19_stones) C++17
17 / 100
 2000 ms 632 KB 
#include <bits/stdc++.h>
using namespace std;
const int N = 1003;

int n, m;

int ans;
char uans[N][N];

char a[N][N];

void ubd()
{
    int yans = 0;
    for (int i = 0; i < n; ++i)
    {
        int q = 0;
        for (int j = 0; j < m; ++j)
        {
            if (a[i][j] == '+')
                ++q;
        }
        if (q * 2 > m)
            ++yans;
    }
    for (int j = 0; j < m; ++j)
    {
        int q = 0;
        for (int i = 0; i < n; ++i)
        {
            if (a[i][j] == '-')
                ++q;
        }
        if (q * 2 > n)
            ++yans;
    }
    if (yans > ans)
    {
        ans = yans;
        for (int i = 0; i < n; ++i)
            for (int j = 0; j < m; ++j)
                uans[i][j] = a[i][j];
    }
}

void rec(int i, int j)
{
    if (i == n)
    {
        ubd();
        return;
    }
    a[i][j] = '+';
    if (j == m - 1)
        rec(i + 1, 0);
    else
        rec(i, j + 1);
    a[i][j] = '-';
    if (j == m - 1)
        rec(i + 1, 0);
    else
        rec(i, j + 1);
}

void solv()
{
    scanf("%d%d", &n, &m);
    ans = 0;
    rec(0, 0);
    printf("%d\n", ans);
    for (int i = 0; i < n; ++i)
    {
        for (int j = 0; j < m; ++j)
            putchar(uans[i][j]);
        putchar('\n');
    }
}

int main()
{
    int tt;
    scanf("%d", &tt);
    while (tt--)
        solv();
    return 0;
}

Compilation message

stones.cpp: In function 'void solv()':
stones.cpp:67:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~
stones.cpp: In function 'int main()':
stones.cpp:82:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &tt);
     ~~~~~^~~~~~~~~~~

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 348 KB Output is correct
2 Correct 5 ms 376 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2059 ms 256 KB Time limit exceeded

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 348 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Execution timed out 2059 ms 256 KB Time limit exceeded

Subtask #4
0 / 11.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2051 ms 632 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 2061 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 348 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Execution timed out 2059 ms 256 KB Time limit exceeded