Compilare: main.cpp: In function 'int main()': main.cpp:21:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1,j = 0;i < pattern.size();i++){ ~~^~~~~~~~~~~~~~~~ main.cpp:31:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0,j = 0;i < text.size();i++){ ~~^~~~~~~~~~~~~ main.cpp:38:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j >= pattern.size()){ ~~^~~~~~~~~~~~~~~~~