Compilare: user.cpp: In function ‘int main(int, const char**)’: user.cpp:29:13: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] in>>sir + 1; ^ user.cpp:41:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < litere.size(); ++ i){ ^ user.cpp:75:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < interv.size(); ++ i){ ^ user.cpp:72:9: warning: unused variable ‘st’ [-Wunused-variable] int st = 1; ^