Compilare: user.cpp: In function ‘int solve3(int, int)’: user.cpp:26:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int solve2(int, int)’: user.cpp:36:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int solve1()’: user.cpp:42:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^