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- #include<bits/stdc++.h>
- using namespace std;
- int main(int argc, char const *argv[])
- {
- int a[200000],i,j,k,l,n;
- cin>>n;
- for(i=1;i<=n;i++) scanf("%d",&a[i]);
- // printf("yess\n");
- int flag=0, fi=0,li=0;
- for(i=1;i<n;i++)
- {
- if(a[i]>a[i+1]) break;
- }
- fi=i;
- while(a[i]>=a[i+1] && i<n)i++;
- li=i;
- // cout<<n<<endl;
- // cout<<li<<endl;
- for(i=fi,j=li;i<j;i++,j--) swap(a[i],a[j]);
- for(i=1;i<n;i++)
- if(a[i]>a[i+1])
- {
- flag = 1;
- break;
- }
- if(flag) printf("no\n");
- else
- {
- printf("yes\n");
- printf("%d %d\n",fi,li );
- }
- }
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