bnuoj 25659 A Famous City (单调栈)

http://www.bnuoj.com/bnuoj/problem_show.php?pid=25659

 1 #include <iostream>
 2 #include <stdio.h>
 3 #include <string.h>
 4 #include <math.h>
 5 #include <algorithm>
 6 #include <stack>
 7 
 8 using namespace std;
 9 
10 int main()
11 {
12     int n,cas=1;
13     while(~scanf("%d",&n))
14     {
15         int i;
16         stack<int> stk;
17         stk.push(-1);
18         int ans = 0;
19         for(i=0;i<n;i++)
20         {
21             int temp;
22             scanf("%d",&temp);
23             while(stk.top()>temp)
24             {
25                 stk.pop();
26             }
27             if(stk.top()!=temp)
28             {
29                 stk.push(temp);
30                 if(temp!=0) ans++;
31             }
32         }
33         while(!stk.empty()){stk.pop();}
34         printf("Case %d: %d
",cas++,ans);
35     }
36     return 0;
37 }
原文地址:https://www.cnblogs.com/crazyapple/p/3406913.html