Submission #2212502


Source Code Expand

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef pair<int,int> pi;
#define mod 1000000007
#define rep(i,a,b) for (int i = a; i <= b; i++)
#define f first
#define s second
#define pb push_back
#define mp make_pair


int n, a[202020], ans;

int main(){
cin >> n;
rep(i, 1, n)cin >> a[i];
rep(i, 1, n-1){
if(a[i]==i)swap(a[i], a[i+1]), ans++;
}
rep(i, 1, n-1){
if(a[i]==i)swap(a[i], a[i+1]), ans++;
}
cout << ans << endl;


return 0;}

Submission Info

Submission Time
Task D - Derangement
User KazukiMH
Language C++14 (GCC 5.4.1)
Score 0
Code Size 510 Byte
Status WA
Exec Time 37 ms
Memory 640 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 0 / 400
Status
AC × 4
AC × 11
WA × 4
Set Name Test Cases
Sample 0_000.txt, 0_001.txt, 0_002.txt, 0_003.txt
All 0_000.txt, 0_001.txt, 0_002.txt, 0_003.txt, 1_004.txt, 1_005.txt, 1_006.txt, 1_007.txt, 1_008.txt, 1_009.txt, 1_010.txt, 1_011.txt, 1_012.txt, 1_013.txt, 1_014.txt
Case Name Status Exec Time Memory
0_000.txt AC 1 ms 256 KB
0_001.txt AC 1 ms 256 KB
0_002.txt AC 1 ms 256 KB
0_003.txt AC 1 ms 256 KB
1_004.txt WA 1 ms 256 KB
1_005.txt AC 37 ms 640 KB
1_006.txt AC 36 ms 640 KB
1_007.txt AC 36 ms 640 KB
1_008.txt WA 36 ms 640 KB
1_009.txt WA 36 ms 640 KB
1_010.txt AC 36 ms 640 KB
1_011.txt WA 36 ms 640 KB
1_012.txt AC 36 ms 640 KB
1_013.txt AC 36 ms 640 KB
1_014.txt AC 37 ms 640 KB