Submission #1230008

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Source Code Expand

#include <cstdio>
#include <algorithm>
static const int MAXN = 504;

int n;
bool a[MAXN][MAXN];

int main()
{
    scanf("%d", &n); getchar();
    for (int i = 0; i < n; ++i)
        for (int j = 0; j <= n; ++j) a[i][j] = (getchar() == '#');

    int has_white_col_ct = 0;
    for (int i = 0; i < n; ++i) {
        bool has_white = false;
        for (int j = 0; j < n; ++j) if (!a[j][i]) has_white = true;
        if (has_white) has_white_col_ct++;
    }
    int row_fill_steps = MAXN;
    for (int r = 0; r < n; ++r) {
        bool has_black_at_col_r = false;
        for (int i = 0; i < n; ++i)
            if (a[i][r]) has_black_at_col_r = true;
        int white_in_row_r = 0;
        for (int i = 0; i < n; ++i)
            if (!a[r][i]) white_in_row_r++;
        row_fill_steps = std::min(row_fill_steps, white_in_row_r + (has_black_at_col_r ? 0 : 1));
    }

    int ans = has_white_col_ct + row_fill_steps;
    printf("%d\n", ans > 2 * n ? -1 : ans);
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:10:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n); getchar();
                    ^

Judge Result