View Compilation Error

0_0_37058173_12790.cpp: In function 'int main()':
0_0_37058173_12790.cpp:39:16: error: 'n1' was not declared in this scope
  ss=min(ss,min(n1,n2));
                ^
0_0_37058173_12790.cpp:39:19: error: 'n2' was not declared in this scope
  ss=min(ss,min(n1,n2));
                   ^