Submission #1559179


Source Code Expand

#include <iostream>
#include <algorithm>
using namespace std;

int N;
int p[100010];

int main(){
	cin.tie(0);
	ios::sync_with_stdio(false);
    
    cin >> N;
    for(int i = 0; i < N; ++i){
        cin >> p[i];
    }

    int cnt = 0;
    if(p[0] == 1){
        cnt++;
        swap(p[0], p[1]);
    }
    for(int i = 1; i < N; ++i){
        if(p[i] == i + 1){
            ++cnt;
            if(p[i] != i + 2 && i != N - 1){
                swap(p[i], p[i + 1]);
            }
            else{
                swap(p[i], p[i - 1]);
            }
        }
    }

    cout << cnt << endl;

	return 0;
}

Submission Info

Submission Time
Task D - Derangement
User mds_boy
Language C++14 (GCC 5.4.1)
Score 400
Code Size 639 Byte
Status AC
Exec Time 9 ms
Memory 640 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 400 / 400
Status
AC × 4
AC × 15
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 AC 1 ms 256 KB
1_005.txt AC 9 ms 640 KB
1_006.txt AC 9 ms 640 KB
1_007.txt AC 9 ms 640 KB
1_008.txt AC 9 ms 640 KB
1_009.txt AC 9 ms 640 KB
1_010.txt AC 9 ms 640 KB
1_011.txt AC 9 ms 640 KB
1_012.txt AC 9 ms 640 KB
1_013.txt AC 9 ms 640 KB
1_014.txt AC 9 ms 640 KB