Submission #1558495


Source Code Expand

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
#define RI(a) scanf("%d",&a)
#define RII(a,b) scanf("%d%d",&a,&b)
#define RIII(a,b,c) scanf("%d%d%d",&a,&b,&c)
#define IOS ios_base::sync_with_stdio(0); cin.tie(0)
#define ALL(a) a.begin(),a.end()
#define F first
#define S second
#define REP(i,n) for(int i=0;i<(n);i++)
#define pb push_back
#ifdef leowang
#define debug(...) do{\
	fprintf(stderr,"%s - %d : (%s) = ",__PRETTY_FUNCTION__,__LINE__,#__VA_ARGS__);\
	_DO(__VA_ARGS__);\
}while(0)
template<typename I> void _DO(I&&x){cerr<<x<<endl;}
template<typename I,typename...T> void _DO(I&&x,T&&...tail){cerr<<x<<", ";_DO(tail...);}
#else
#define debug(...)
#endif
//}}}
const ll maxn=100005;
const ll maxlg=__lg(maxn)+2;
const ll INF64=8000000000000000000LL;
const int INF=2000000000;

int n; 
int a[maxn];

int main()
{
	cin>>n;
	REP(i,n) scanf("%d",a+i);
	int ans=0;
	for(int i=0;i<n-1;i++){
		if(a[i]==i+1){
			swap(a[i],a[i+1]);
			ans++;
		}
	}
	cout<<ans;
	return 0;
}

Submission Info

Submission Time
Task D - Derangement
User iloveIMO
Language C++14 (GCC 5.4.1)
Score 0
Code Size 1066 Byte
Status WA
Exec Time 11 ms
Memory 640 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:36:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  REP(i,n) scanf("%d",a+i);
                          ^

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