def middle(a,b,c): if a!=min(min(a,b),c) and a!=max(max(a,b),c): return (a) elif b!=min(min(a,b),c) and b!=max(max(a,b),c): return (b) elif c!=min(min(a,b),c) and c!=max(max(a,b),c): return (c)
a = int(input()) b = int(input()) c = int(input()) print(middle(a,b,c))
#include <iostream> #include <stdio.h> using namespace std;
int main(){ int y; cin>>y; y=y%12; switch (y){ case 4:{cout<<"Mouse"; break;} case 5:{cout<<"Bull";break;} case 6:{cout<<"Tiger";break;} case 7:{cout<<"Rabbit";break;} case 8:{cout<<"Dragon";break;} case 9:{cout<<"Snake";break;} case 10:{cout<<"Horse";break;} case 11:{cout<<"Goat";break;} case 0:{cout<<"Monkey";break;} case 1:{cout<<"Cock";break;} case 2:{cout<<"Dog";break;} case 3:{cout<<"Pig";break;} } cin.get(); cin.get(); return 0; }
if a!=min(min(a,b),c) and a!=max(max(a,b),c):
return (a)
elif b!=min(min(a,b),c) and b!=max(max(a,b),c):
return (b)
elif c!=min(min(a,b),c) and c!=max(max(a,b),c):
return (c)
a = int(input())
b = int(input())
c = int(input())
print(middle(a,b,c))