BZOJ 1113: [Poi2008]海报PLA

 1 /*Author:WNJXYK*/
 2 #include<cstdio>
 3 using namespace std;
 4 int t,x,n,s[250001],top,ans;
 5 int main(){
 6     scanf("%d",&n);
 7     for(int i=1;i<=n;i++){
 8        scanf("%d%d",&t,&x);
 9        while(x<=s[top]){
10            if(x==s[top])ans++;
11            top--;
12        }
13        s[++top]=x;
14     }
15     printf("%d",n-ans);
16     return 0;
17 }