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Submission #846639

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```#include <bits/stdc++.h>
// iostream is too mainstream
#include <cstdio>
#include <iostream>
#include <algorithm>
#include <cstdlib>
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <stack>
#include <list>
#include <cmath>
#include <iomanip>
#include <time.h>
#define dibs reserve
#define OVER9000 1234567890
#define ALL_THE(CAKE,LIE) for(auto LIE =CAKE.begin(); LIE != CAKE.end(); LIE++)
#define tisic 47
#define soclose 1e-8
#define chocolate win
// so much chocolate
#define patkan 9
#define ff first
#define ss second
#define abs(x) ((x < 0)?-(x):x)
#define uint unsigned int
#define dbl long double
#define pi 3.14159265358979323846
using namespace std;
// mylittledoge

#ifdef DONLINE_JUDGE
// palindromic tree is better than splay tree!
#define lld I64d
#endif

int main() {
cin.sync_with_stdio(0);
cin.tie(0);
cout << fixed << setprecision(10);
int N;
cin >> N;
vector< pair<int,int> > A(N);
for(int i =0; i < N; i++) {
cin >> A[i].ff;
A[i].ss =i;}
sort(begin(A),end(A));
int ans =0;
for(int i =0; i < N; i++) if((A[i].ss-i)%2 != 0) ans++;
cout << ans/2 << "\n";
return 0;}

// look at my code
// my code is amazing
```

#### Submission Info

Submission Time 2016-08-21 21:42:15+0900 C - BBuBBBlesort! xellos C++14 (GCC 5.4.1) 600 1239 Byte AC 35 ms 1024 KB

#### Judge Result

Set Name Sample All
Score / Max Score 0 / 0 600 / 600
Status
 AC × 2
 AC × 24
Set Name Test Cases
Sample s1.txt, s2.txt
All 01.txt, 02.txt, 03.txt, 04.txt, 05.txt, 06.txt, 07.txt, 08.txt, 09.txt, 10.txt, 11.txt, 12.txt, 13.txt, 14.txt, 15.txt, 16.txt, 17.txt, 18.txt, 19.txt, 20.txt, 21.txt, 22.txt, s1.txt, s2.txt
Case Name Status Exec Time Memory
01.txt AC 35 ms 1024 KB
02.txt AC 35 ms 1024 KB
03.txt AC 35 ms 1024 KB
04.txt AC 35 ms 1024 KB
05.txt AC 31 ms 1024 KB
06.txt AC 31 ms 1024 KB
07.txt AC 30 ms 1024 KB
08.txt AC 22 ms 1024 KB
09.txt AC 22 ms 1024 KB
10.txt AC 21 ms 1024 KB
11.txt AC 21 ms 1024 KB
12.txt AC 21 ms 1024 KB
13.txt AC 22 ms 1024 KB
14.txt AC 31 ms 1024 KB
15.txt AC 31 ms 1024 KB
16.txt AC 31 ms 1024 KB
17.txt AC 31 ms 1024 KB
18.txt AC 4 ms 256 KB
19.txt AC 4 ms 256 KB
20.txt AC 4 ms 256 KB
21.txt AC 4 ms 256 KB
22.txt AC 4 ms 256 KB
s1.txt AC 4 ms 256 KB
s2.txt AC 4 ms 256 KB