#include <iostream> //1328 using namespace std; int a[2009]; int main() { int n,m; cin>>n; for(int i=1;i<=n;i++) cin>>a[i]; //数据输入 cin >>m; int first=-1,last=-1; //处理：找第一个，和最后一个 与m相等 for(int i=1;i<=n;i++) { if(first ==-1 && a[i] ==m ) first = i; if( a[i]==m) last = i; } if (first==-1) cout<< -1; else cout<< first << " " << last; return 0; }