Borderou de evaluare (job #440488)

Compilare: user.cpp: In function ‘char det_semn(std::string)’: user.cpp:6:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function ‘int solve2(std::string)’: user.cpp:48:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:60:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:46:9: warning: unused variable ‘c’ [-Wunused-variable] user.cpp:87:1: warning: control reaches end of non-void function [-Wreturn-type] user.cpp: In function ‘int solve1(std::string)’: user.cpp:43:1: warning: control reaches end of non-void function [-Wreturn-type] user.cpp: In function ‘char det_semn(std::string)’: user.cpp:12:1: warning: control reaches end of non-void function [-Wreturn-type]