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  10Tin_Nghia  commented on July 11, 2024, 9:20 p.m.

  include <bits/stdc++.h>

  using namespace std; long long a,b,R,x,y,d; int main() { cin>>a>>b>>R>>x>>y; double d=sqrt((a-x)(a-x)+(b-y)(b-y)) ;if(d<R) cout<<"1"; else if(d==R) cout<<"2"; else if(d>R) cout<<"3"; return 0; }