Submission #4261878

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Source Code Expand

#include<iostream>
#include<cstdio>
#include<cstring>
#include<algorithm>
#include<cmath>
using namespace std;
int n,sum=0;
struct Sort{
	int num;
	int index;
	int sindex;
}a[100010];
bool cmp(Sort c,Sort d)
{
	return c.num<d.num;
}
int main()
{
	scanf("%d",&n);
	for(int i=1;i<=n;i++) {cin>>a[i].num;a[i].index=i;}
	sort(a+1,a+n+1,cmp);
	for(int i=1;i<=n;i++)
	{
		a[i].sindex=i;
	}
	for(int i=1;i<=n;i++)
	{
		if(abs(a[i].sindex-a[i].index)%2==1) sum++;
	}
	sum/=2;
	printf("%d",sum);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:19:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^

Judge Result