Submission #733784

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Source Code Expand

#include<stdio.h>

int main(void){
	unsigned long a[100000],ans=0;
	int k,a_max,i;
	scanf("%d%d",&a_max,&k);
	for(i=0;i<a_max;i++){
		scanf("%ld",&a[i]);
	}
	if(k-1<a_max-k){
		for(i=0;i<k-1;i++){
			ans+=a[i]*(i+1);
		}
		for(i=a_max;i>a_max-k+1;i--){
			ans+=a[i-1]*(a_max-i+1);
		}
		for(i=k-1;i<=a_max-k;i++){
			ans+=a[i]*k;
		}
	}else{
		for(i=0;i<a_max-k;i++){
			ans+=a[i]*(i+1);
		}
		for(i=a_max;i>k;i--){
			ans+=a[i-1]*(a_max-i+1);
		}
		for(i=a_max-k;i<k;i++){
			ans+=a[i]*(a_max-k+1);
		}
	}
	printf("%ld\n",ans);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:6:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&a_max,&k);
                         ^
./Main.cpp:8:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%ld",&a[i]);
                     ^

Judge Result