Submission #845408

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
const int N = 100005;
const int M = 1000000007;

int n, m;
pair<int, int> a[N];

int main() {
  while (~scanf("%d", &n)) {
    for (int i = 0; i < n; i++) {
      scanf("%d", &a[i].first); a[i].second = i;
    }
    sort(a, a + n);
    int ans = 0;
    for (int i = n - 1; i >= 0; i--) {
      ans += max(0, i - a[i].second) % 2;
    }
    printf("%d\n", ans);
  }
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:14:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
       scanf("%d", &a[i].first); a[i].second = i;
                               ^

Judge Result