View Compilation Error

0_0_36570090_3805.cpp: In function 'void solve()':
0_0_36570090_3805.cpp:37:2: error: 's1' was not declared in this scope
  s1=sum=0;
  ^
0_0_36570090_3805.cpp:37:5: error: 'sum' was not declared in this scope
  s1=sum=0;
     ^
0_0_36570090_3805.cpp:38:2: error: 'ans' was not declared in this scope
  ans=INF;
  ^