Submission #3234253

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Source Code Expand

//waz
#include <bits/stdc++.h>

using namespace std;

#define mp make_pair
#define pb push_back
#define fi first
#define se second
#define ALL(x) (x).begin(), (x).end()
#define SZ(x) ((int)((x).size()))

typedef pair<int, int> PII;
typedef vector<int> VI;
typedef long long int64;
typedef unsigned int uint;
typedef unsigned long long uint64;

#define gi(x) ((x) = F())
#define gii(x, y) (gi(x), gi(y))
#define giii(x, y, z) (gii(x, y), gi(z))

int F()
{
	char ch;
	int x, a;
	while (ch = getchar(), (ch < '0' || ch > '9') && ch != '-');
	if (ch == '-') ch = getchar(), a = -1;
	else a = 1;
	x = ch - '0';
	while (ch = getchar(), ch >= '0' && ch <= '9')
		x = (x << 1) + (x << 3) + ch - '0';
	return a * x;
}

char str[2010][2010];

int a[2010][2010], b[2010][2010], c[2010][2010];

int n, m, q;

int main()
{
	giii(n, m, q);
	for (int i = 1; i <= n; ++i) scanf("%s", str[i] + 1);
	for (int i = 1; i <= n; ++i)
	{
		for (int j = 1; j <= m; ++j)
			if (str[i][j] == '1') ++a[i][j];
		for (int j = 1; j < m; ++j)
			if (str[i][j] == '1' && str[i][j + 1] == '1') ++b[i][j];
		if (i < n)
			for (int j = 1; j <= m; ++j)
				if (str[i][j] == '1' && str[i + 1][j] == '1') ++c[i][j];
	}
	for (int i = 1; i <= n; ++i)
		for (int j = 1; j <= m; ++j)
		{
			a[i][j] += a[i][j - 1] + a[i - 1][j] - a[i - 1][j - 1];
			b[i][j] += b[i][j - 1] + b[i - 1][j] - b[i - 1][j - 1];
			c[i][j] += c[i][j - 1] + c[i - 1][j] - c[i - 1][j - 1];
		}
	while (q--)
	{
		int x1, y1, x2, y2;
		gii(x1, y1);
		gii(x2, y2);
		int A = a[x2][y2] + a[x1 - 1][y1 - 1] - a[x2][y1 - 1] - a[x1 - 1][y2];
		//cerr << "A = " << a[x2][y2] << endl;
		int B = b[x2][y2 - 1] + b[x1 - 1][y1 - 1] - b[x2][y1 - 1] - b[x1 - 1][y2 - 1];
		int C = c[x2 - 1][y2] + c[x1 - 1][y1 - 1] - c[x2 - 1][y1 - 1] - c[x1 - 1][y2];
		printf("%d\n", A - B - C);
	}
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:45:54: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  for (int i = 1; i <= n; ++i) scanf("%s", str[i] + 1);
                                                      ^

Judge Result