CSES - Datatähti Open 2021 - Results
Submission details
Task:Sorting
Sender:NewResolution
Submission time:2021-01-30 06:48:48 +0200
Language:C++ (C++17)
Status:READY
Result:0
Feedback
groupverdictscore
#10
#20
Test results
testverdicttimegroup
#10.01 s1, 2details
#20.01 s2details
#3ACCEPTED0.01 s1, 2details
#4ACCEPTED0.01 s1, 2details

Compiler report

input/code.cpp: In function 'int inv(std::vector<int>)':
input/code.cpp:11:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < v.size(); i++) {
                     ~~^~~~~~~~~~
input/code.cpp:12:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int j = i + 1; j < v.size(); j++) {
                             ~~^~~~~~~~~~

Code

#include <iostream>
#include <vector>
#include <set>
#include <queue>
#include <algorithm>
using namespace std;
int inv(vector<int> v) {
int ans = 0;
for (int i = 0; i < v.size(); i++) {
for (int j = i + 1; j < v.size(); j++) {
if (v[i] > v[j]) ans++;
}
}
return ans;
}
int main() {
ios_base::sync_with_stdio(false); cin.tie(0);
int t; cin >> t;
while (t--) {
int n; cin >> n;
vector<int> v;
while (n--) {
int x; cin >> x;
v.push_back(x);
}
cout << (inv(v) % 2 ? "NO" : "YES") << endl;
}
return 0;
}

Test details

Test 1

Group: 1, 2

Verdict:

input
153
1
1
2
1 2
...

correct output
YES
YES
NO
NO
NO
...

user output
YES
YES
NO
NO
YES
...
Truncated

Test 2

Group: 2

Verdict:

input
1000
59
35 29 32 50 11 15 9 21 19 45 2...

correct output
YES
NO
YES
NO
YES
...

user output
YES
NO
YES
NO
YES
...
Truncated

Test 3

Group: 1, 2

Verdict: ACCEPTED

input
720
6
1 6 4 5 2 3
6
6 3 2 1 5 4
...

correct output
YES
NO
NO
NO
YES
...

user output
YES
NO
NO
NO
YES
...
Truncated

Test 4

Group: 1, 2

Verdict: ACCEPTED

input
1000
8
7 4 2 8 6 3 5 1
8
3 8 2 7 5 4 6 1
...

correct output
NO
NO
YES
NO
YES
...

user output
NO
NO
YES
NO
YES
...
Truncated