#include<cstdio>#include<iostream>#include<algorithm>using namespace std;int main(){    int n,a[100005],left = 1,right = 1;    cin >> n;    for(int i = 1;i <= n;i++)    {        cin >> a[i];    }    for(int i = 1;i <= n-1;i++)    {        if(a[i] > a[i+1])        {            left = i;            break;        }    }    for(int i = n;i > 0;i--)    {        if(a[i] < a[i-1])        {            right = i;            break;        }    }    reverse(a+left,a+right+1);    int flag = 1;    for(int i = 1;i <= n-1;i++)    {        if(a[i] > a[i+1])        {            flag = 0;            break;        }    }    if(flag)    {        printf("yes\n");        printf("%d %d\n",left,right);    }    else    {        printf("no\n");    }    return 0;}