Compilare: main.cpp: In function 'int main()': main.cpp:43:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1; i <= b.size() - n; ++i){ ~~^~~~~~~~~~~~~~~ main.cpp:67:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( i = 0; i < v.size(); ++i ) ~~^~~~~~~~~~