View Compilation Error

0_0_17930869_13232.cpp: In function 'int solve(int, int, int)':
0_0_17930869_13232.cpp:34:16: error: 'su' was not declared in this scope
  if(p) ans=ans-su
                ^
0_0_17930869_13232.cpp:34:16: error: expected '}' at end of input