#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int n,min=232,c=0,a[1001],mina,minb; cin>>n; for(int i=0;i<n;i++){ cin>>a[i]; } mina=1; minb=2; for(int i=1;i<=n;i++){ for(int j=i+1;j<=n;j++){ if(abs(a[i]-a[j])<min){ min=abs(a[i]-a[j]); mina=i;minb=i; } } } cout<<mina<<" "<<minb; return 0; }