Submission #2250047


Source Code Expand

#include<bits/stdc++.h>
#define N 500005
using namespace std;
int n,a[N];
int main(){
	scanf("%d",&n);
	for (int i=1;i<=n;i++) scanf("%d",&a[i]);
	int ans=0;
	for (int i=1;i<n;i++){
		if (a[i]==i){
			swap(a[i],a[i+1]);
			ans++;
		}
	}
	if (a[n]==n) ans++;
	printf("%d\n",ans);
	return 0;
}

Submission Info

Submission Time
Task D - Derangement
User trans
Language C++14 (GCC 5.4.1)
Score 400
Code Size 308 Byte
Status AC
Exec Time 11 ms
Memory 640 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:6:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^
./Main.cpp:7:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  for (int i=1;i<=n;i++) scanf("%d",&a[i]);
                                          ^

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 10 ms 640 KB
1_006.txt AC 10 ms 640 KB
1_007.txt AC 10 ms 640 KB
1_008.txt AC 10 ms 640 KB
1_009.txt AC 10 ms 640 KB
1_010.txt AC 10 ms 640 KB
1_011.txt AC 10 ms 640 KB
1_012.txt AC 10 ms 640 KB
1_013.txt AC 11 ms 640 KB
1_014.txt AC 10 ms 640 KB