Submission #845483

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
const int N = 1e5+10;
pair<int,int> a[N];
int main() {
	int n;
	scanf("%d",&n);
	for (int i=0;i<n;i++) {
		int x;
		scanf("%d",&x);
		a[i] = {x,i};
	}
	sort(a,a+n);
	int ans = 0;
	for (int i=0;i<n;i++) if ((a[i].second^i)&1) ans++;
	printf("%d\n",ans/2);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:7:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^
./Main.cpp:10:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&x);
                 ^

Judge Result