Submission #845175

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Source Code Expand

#include<bits/stdc++.h>
#define N 100100
using namespace std;
int a[N],id[N];
bool cmp(int i,int j){
	return a[i]<a[j];
}
int main(){
	int n,ans=0;
	scanf("%d",&n);
	for(int i=0;i<n;i++){
		scanf("%d",&a[i]);
		id[i]=i;
	}
	sort(id,id+n,cmp);
	for(int i=0;i<n;i+=2){
		if(id[i]&1) ans++;
	}
	printf("%d\n",ans);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:10:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^
./Main.cpp:12:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a[i]);
                    ^

Judge Result