Submission #845480

---

Source Code Expand

#include <stdio.h>
#include <algorithm>
using namespace std;

pair<int, int> A[100005];

int abs(int x){ return x < 0 ? -x : x; }

int main(){
    int N;
    scanf("%d", &N);
    for(int i=0; i<N; i++) scanf("%d", &A[i].first), A[i].second = i;
    sort(A, A+N);
    int res=0;
    for(int i=0; i<N; i++){
        if(abs(A[i].second-i)%2) res++;
    }
    printf("%d", res/2);
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:11:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &N);
                    ^
./Main.cpp:12:69: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     for(int i=0; i<N; i++) scanf("%d", &A[i].first), A[i].second = i;
                                                                     ^

Judge Result