View Compilation Error

0_0_37756948_9426.cpp: In function 'void solve()':
0_0_37756948_9426.cpp:32:14: error: 's' was not declared in this scope
     if(a[1]==s[1])
              ^
0_0_37756948_9426.cpp:36:11: error: 's' was not declared in this scope
  if(b[1]==s[1])
           ^