题意:按1~n进栈,然后给出一个顺序,看能否按照这个顺序出栈
#include<cstdio>
#include<iostream>
#include<cstring>
using namespace std;
int main(){
int a[1005], b[1005], i, j, k, n;
while(scanf("%d", &n), n){
while(scanf("%d", &b[0]), b[0]){
for(j = 1; j < n; j++)
scanf("%d", &b[j]);
for(i = 1, j = 0, k = 0; i <= n && j < n; i++, k++){
a[k] = i;
while(a[k] == b[j]){
if(k > 0)
k--;
else{
a[k] = 0;
k--;
}
j++;
if(k == -1)
break;
}
}
if(j == n)
puts("Yes");
else
puts("No");
}
puts("");
}
return 0;
}