Submission #1368829

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Source Code Expand

#include <cstdio>
#define maxn 100010
using namespace std;
int n,c[maxn],ans;
int main() {
	scanf("%d",&n);
	for (int i=1;i<=n;i++) {
		int a;
		scanf("%d",&a);
		c[a]++;
	}
	int min=1;
	while (c[min]<=1&&min<=n)
		min++;
	int max=100000;
	while (c[max]<=1&&max>=1)
		max--;
	ans=n;
	while (min<=max) {
		if (min==max&&c[min]==2) {
			ans-=2;
			break;
		}
		ans-=2;
		c[min]--; c[max]--;
		while (c[min]<=1&&min<=n)
			min++;
		while (c[max]<=1&&max>=1)
			max--;
	}
	printf("%d\n",ans);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:6:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^
./Main.cpp:9:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a);
                 ^

Judge Result