#include <iostream>
#include <algorithm>
using namespace std;
#define max 100010
int a[max],b[max];
bool cmp(int a,int b){
return a<b;
}
int main(){
int n;
while(cin>>n){
for(int i=0;i<n;i++){
cin>>a[i]; b[i]=a[i];
}
sort(a,a+n,cmp);
int st=0,en=0;
bool ok1=true,ok2=true;
for(int i=0;i<n;i++){
if(a[i]!=b[i]&&ok1){
st=i;ok1=false;
}
if(a[n-1-i]!=b[n-1-i]&&ok2){
en=n-1-i;
ok2=false;
}
if(!ok1&&!ok2)break;
}
//cout<<st<<en<<endl;
bool ok3=true;
for(int i=st;i<en;i++){
if(b[i]<b[i+1]){ok3=false;break;}
}
if(ok3)cout<<"yes\n"<<st+1<<" "<<en+1<<endl;
else cout<<"no"<<endl;
}
return 0;
}
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时间: 2024-10-13 00:29:14