Compilare: user.cpp: In function ‘int main()’: user.cpp:36:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<strlen(s); i++) ^ user.cpp: In function ‘int sub(int, int)’: user.cpp:9:21: warning: ‘Sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] int sta=1,dr=N,mid,Sol; ^ user.cpp: In function ‘int main()’: user.cpp:55:24: warning: ‘Sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] sum=sum+rez; ^