Sorting

input/code.cpp: In function 'int main()':
input/code.cpp:6:11: warning: unused variable 'first' [-Wunused-variable]
 #define x first
           ^
input/code.cpp:19:16: note: in expansion of macro 'x'
         int n, x, y, t;
                ^
input/code.cpp:7:11: warning: unused variable 'second' [-Wunused-variable]
 #define y second
           ^
input/code.cpp:19:19: note: in expansion of macro 'y'
         int n, x, y, t;
                   ^

#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define pb push_back
#define ppb pop_back
#define x first
#define y second
#define int long long
#define mp make_pair

using namespace std;

const int inf = 1e18, sz = 105;

int arr[sz];
signed main (){
//    cin.tie(0);
//    ios_base::sync_with_stdio(0);
        int n, x, y, t;
        cin >> t;
        while (t--){
        cin >> n;
        int res = 0;
        for (int i = 1; i <= n; ++i){
            cin >> arr[i];
            res += abs(arr[i] - i);
        }
        res /= 2;
        if ((res % 2 == 1 || n <= 3) && res != 0) cout << "NO\n";
        else cout << "YES\n";
        }
    return 0;
}

Test 1

Group: 1, 2

Verdict: WRONG ANSWER

Test 2

Group: 2

Verdict: WRONG ANSWER

Test 3

Group: 1, 2

Verdict: WRONG ANSWER

Test 4

Group: 1, 2

Verdict: WRONG ANSWER