计蒜客 18488.Extreme Sort (German Collegiate Programming Contest 2015 ACM-ICPC Asia Training League 暑假第一阶段第三场 E)

 1 #include<iostream>
 2 #include<cstdio>
 3 #include<cstring>
 4 #include<algorithm>
 5 #include<cmath>
 6 using namespace std;
 7 const int maxn=1e5+10;
 8 int a[maxn];
 9 int main(){
10     int n;
11     scanf("%d",&n);
12     for(int i=0;i<n;i++)
13         scanf("%d",&a[i]);
14     for(int i=1;i<n;i++){
15         if(a[i]<a[i-1]){
16             cout<<"no"<<endl;
17             return 0;
18         }
19     }
20     cout<<"yes"<<endl;
21 }