Submission #1372613

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Source Code Expand

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#define swap(type,a,b) do{type t=a;a=b;b=t;}while(0);
#define MAX(a,b) (((a)>(b))?(a):(b))
#define MIN(a,b) (((a)<(b))?(a):(b))
#define ll long long
#define INF 100000000
#define FOR(i,a,n) for(i=a;i<n;i++)
int comp(const void* a,const void* b){
	return *(int*)b-*(int*)a;
}
void fill(int a[],int b,int c){
	int i;
	FOR(i,0,b) a[i]=c;
	return;
}
int a[300000];
int main(void)
{
	int n,i;
	ll sum=0;
	scanf("%d",&n);
	FOR(i,0,3*n) scanf("%d",&a[i]);
	qsort(a,3*n,sizeof(int),comp);
	for(i=0;i<n;i++){
		sum+=a[i*2+1];
	}
	printf("%lld\n",sum);
	return 0;
}
    

Submission Info

Compile Error

./Main.c: In function ‘main’:
./Main.c:24:2: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ^
./Main.c:25:15: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
  FOR(i,0,3*n) scanf("%d",&a[i]);
               ^

Judge Result