Compilare: user.cpp: In function ‘int solve()’: user.cpp:25:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while( i < s.size()) ^ user.cpp: In function ‘int smax()’: user.cpp:40:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while( i < s.size()) ^ user.cpp: In function ‘int med()’: user.cpp:82:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while( i < s.size()) ^ user.cpp:81:9: warning: unused variable ‘ans’ [-Wunused-variable] int ans = 0, nr = 0, sign = 1; ^ user.cpp: In function ‘int smax()’: user.cpp:77:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int med()’: user.cpp:93:1: warning: control reaches end of non-void function [-Wreturn-type] } ^