Submission #1780820

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Source Code Expand

#include <cstdio>
#include <cmath>
#include <cstring>
#include <numeric>
#include <algorithm>
#include <vector>
#include <stack>
#include <queue>
#include <deque>
#include <map>
#include <utility>
#include <string>

using namespace std;

typedef long long ll;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef pair<int, int> pii;
typedef pair<ll, int> pli;

const int iinf = 1 << 29;
const long long linf = 1ll << 61;

#define modp(x, y) (((y) + (x) % (y)) % (y))

int N;
int A[100000];

int main(int argc, char* argv[])
{
	scanf("%d", &N);
	for(int i = 0; i < N; i++) scanf("%d", &A[i]);
	sort(A, A + N);

	int w = 0, h = 0;
	for(int i = N - 1; i > 0; i--)
	{
		if(A[i] == A[i - 1] && w == 0)
		{
			w = A[i];
			i--;
		}
		else if(A[i] == A[i - 1] && w != 0)
		{
			h = A[i];
			break;
		}
	}
	printf("%d\n", w * h);

	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main(int, char**)’:
./Main.cpp:32:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &N);
                 ^
./Main.cpp:33:47: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  for(int i = 0; i < N; i++) scanf("%d", &A[i]);
                                               ^

Judge Result