Compilare: main.cpp: In function 'int main()': main.cpp:36:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < s.size(); i++) ~~^~~~~~~~~~ main.cpp:49:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = m; i < a.size(); i++) { ~~^~~~~~~~~~