PAT (Advanced Level) 1051. Pop Sequence (25)
简单题。
#include<iostream>
#include<cstring>
#include<cmath>
#include<algorithm>
#include<cstdio>
#include<map>
#include<queue>
#include<string>
#include<stack>
#include<vector>
using namespace std; int n,k,m;
int a[+];
stack<int>S; bool check()
{
while(!S.empty()) S.pop();
int Max=,sz=;
int now=;
int p=;
while()
{
int tmp=sz;
if(S.empty()&&p<=k)
{
S.push(p++);
sz++;
Max=max(sz,Max);
}
else
{
if(S.top()==a[now])
{
S.pop(); now++;
sz--;
}
else
{
if(p<=k)
{
S.push(p++);
sz++;
Max=max(sz,Max);
}
}
}
if(now==k+||sz==tmp) break;
}
if(Max<=m&&now==k+) return ;
return ;
} int main()
{
scanf("%d%d%d",&m,&k,&n);
for(int i=;i<=n;i++)
{
for(int j=;j<=k;j++) scanf("%d",&a[j]);
if(check()) printf("YES\n");
else printf("NO\n");
} return ;
}
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