View Compilation Error

0_0_23255904_25418.cpp: In function 'int maintain(const int&, const int&, const int&)':
0_0_23255904_25418.cpp:44:9: error: return-statement with no value, in function returning 'int' [-fpermissive]
         return;
         ^
0_0_23255904_25418.cpp:52:13: error: return-statement with no value, in function returning 'int' [-fpermissive]
             return;
             ^