View Compilation Error

0_0_33515694_27402.cpp:21:16: error: expected '}' at end of input
   while (groups) 
                ^
0_0_33515694_27402.cpp: In member function 'void Solution::readdata()':
0_0_33515694_27402.cpp:21:16: error: expected statement at end of input
0_0_33515694_27402.cpp:21:16: error: expected '}' at end of input
0_0_33515694_27402.cpp: At global scope:
0_0_33515694_27402.cpp:21:16: error: expected unqualified-id at end of input