Submission #4776

#	Time	Username	Problem	Language	Result	Execution time	Memory
4776		gs13068	Crazy old lady (IZhO13_crazy)	C++98	100 / 100	12 ms	1092 KiB

crazy

#include<cstdio>

int a[1000];
bool seat[1001];

int main()
{
	int tc;
	scanf("%d",&tc);
	while(tc--)
	{
		int ans=0;
		int i,j,n,t;
		scanf("%d",&n);
		for(i=0;i<n;i++)scanf("%d",&a[i]);
		for(i=1;i<=n;i++)
		{
			for(j=1;j<=n;j++)seat[j]=false;
			seat[a[0]]=true;
			for(j=1;j<n;j++)
			{
				t=j;
				if(t>=i)t++;
				if(!seat[t]&&a[j]!=t)break;
				seat[a[j]]=true;
			}
			if(j==n)
			{
				if(ans)ans=-1;
				else ans=i;
			}
		}
		printf("%d\n",ans>0?ans:0);
	}
}

• Subtask 1: 100 / 100