Compilare: user.cpp: In function ‘int calc(int)’: user.cpp:65:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<v.size(); j++) ^ user.cpp:74:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<v.size(); j++) ^ user.cpp: In function ‘int main()’: user.cpp:96:11: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] f>>sir+1; ^ user.cpp: In function ‘int calc(int)’: user.cpp:92:1: warning: control reaches end of non-void function [-Wreturn-type] } ^