Submission #1131697

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Source Code Expand

#include <bits/stdc++.h>

using namespace std;

const int mxn = 506;

int n;
char a[mxn][mxn];

bool allwhite() {
	for (int i = 0; i < n; ++i)
		for (int j = 0; j < n; ++j)
			if (a[i][j] == '#')
				return false;
	return true;
}

int ans = 0x3f3f3f3f;

bool allblack(int x) {
	for (int i = 0; i < n; ++i)
		if (a[x][i] != '#')
			return false;
	return true;
}

bool anyblack() {
	for (int i = 0; i < n; ++i)
		if (allblack(i))
			return true;
	return false;
}

bool canywhite(int x) {
	for (int i = 0; i < n; ++i)
		if (a[i][x] == '.')
			return true;
	return false;
}

bool canyblack(int x) {
	for (int i = 0; i < n; ++i)
		if (a[i][x] == '#')
			return true;
	return false;
}

int main() {
	cin >> n;
	for (int i = 0; i < n; ++i)
		scanf("%s", a[i]);
	
	if (allwhite()) {
		puts("-1");
		return 0;
	}
	
	if (anyblack()) {
		ans = 0;
		for (int i = 0; i < n; ++i)
			ans += canywhite(i);
		cout << ans << endl;
		return 0;
	}
	
	for (int i = 0; i < n; ++i) {
		if (canyblack(i)) {
			int cnt = 0;
			for (int j = 0; j < n; ++j) {
				if (a[i][j] == '.')
					++cnt;
				if (canywhite(j))
					++cnt;
			}
			ans = min(ans, cnt);
		} else {
			int cnt = 1;
			for (int j = 0; j < n; ++j) {
				if (a[i][j] == '.')
					++cnt;
				if (canywhite(j))
					++cnt;
			}
			ans = min(ans, cnt);
		}
	}
	
	cout << ans << endl;
	
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:51:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%s", a[i]);
                    ^

Judge Result