Compilare: user.cpp: In function ‘int main()’: user.cpp:25:13: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] f >> str+1 ; ^ user.cpp:26:14: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] f >> pref+1 ; ^ user.cpp:27:13: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] f >> suf+1 ; ^ user.cpp:97:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<posf.size();++i) ^ user.cpp:106:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i<poss.size()) ^ user.cpp:108:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (j<posf.size() && posf[j]<poss[i]+len-1) ++j; ^