#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 k,j,s,a[1001],min=10000000000,m_i,m_j; cin>>s; for(int i=1;i<=s;i++){ cin>>a[i]; } for(int i=1;i<=s-1;i++){ for(j=i+1;j<=s;j++){ if(abs(a[i]-a[j])<min){ min=abs(a[i]-a[j]); m_i=i; m_j=j; } } } cout<<m_i<<" "<<m_j; return 0; }