20个测试点，16个RE，2个WA，2个AC，求调

chentonghe @ 2024-09-01 21:29:20

#include<iostream>
using namespace std;
int a[15][15];
bool check(int x1, int y1, int x2, int y2)
{
    int x[2] = {0, 0};
    for (int i = x1; i <= x2; i++)
        for (int j = y1; j <= y2; j++)
            x[a[i][j]]++;
    return x[0] == x[1];
}
int main()
{
    int n, m;
    cin >> n >> m;
    for(int i = 1; i <= n; i++)
        for(int j = 1; j <= m; j++)
            cin >> a[i][j];
    int ans = 0;
    for (int i = 1; i <= n; i++)
    {
        for (int j = 1; j <= m; j++)
        {
            for (int ii = i; ii <= n; ii++)
            {
                for (int jj = j; jj <= m; jj++)
                {
                    if (check(i, j, ii, jj))
                        ans = max(ans, (ii - i + 1) * (jj - j + 1));
                }
            }
        }
    }
    cout << ans << endl;
    return 0;
}

by WaTleZero_pt @ 2024-09-01 21:44:06

有没有可能，输入数据是字符串不是单个的数字

by WaTleZero_pt @ 2024-09-01 21:44:21

@chentonghe

by 枫原千叶 @ 2024-09-01 21:48:57

抄的chenzhe吧，少抄点代码

int数组的读入会出问题，比如某行是“10000”，int会认为这只是一个数字，而不是五个数字

#include<iostream>

using namespace std;

int a[15][15];
char f[15][15];

bool check(int x1, int y1, int x2, int y2)
{
    int x[2] = {0, 0};
    for (int i = x1; i <= x2; i++)
        for (int j = y1; j <= y2; j++)
            x[a[i][j]]++;
    return x[0] == x[1];
}

int main()
{
    int n, m;
    cin >> n >> m;
    for(int i = 1; i <= n; i++)
        for(int j = 1; j <= m; j++)
            cin >> f[i][j],a[i][j]=f[i][j]-'0';
    int ans = 0;
    for (int i = 1; i <= n; i++)
    {
        for (int j = 1; j <= m; j++)
        {
            for (int ii = i; ii <= n; ii++)
            {
                for (int jj = j; jj <= m; jj++)
                {
                    if (check(i, j, ii, jj))
                        ans = max(ans, (ii - i + 1) * (jj - j + 1));
                }
            }
        }
    }
    cout << ans << endl;
    return 0;
} @[chentonghe](/user/1391560)