Compilare: main.cpp: In function 'bool Check(int)': main.cpp:35:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = pos; i < pos + pat.size(); ++i ) ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'void Do()': main.cpp:52:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 1; i < pat.size(); ++i ) ~~^~~~~~~~~~~~ main.cpp:57:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < pat.size(); ++i ) ~~^~~~~~~~~~~~ main.cpp:60:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < pat.size(); ++i ) ~~^~~~~~~~~~~~ main.cpp:67:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 1; i + aux - 1 < A.size(); ++i ) ~~~~~~~~~~~~^~~~~~~~~~ main.cpp: In function 'int Nr(const char&)': main.cpp:31:1: warning: control reaches end of non-void function [-Wreturn-type] } ^