Compilare: main.cpp:34:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] main() ^ main.cpp: In function 'int main()': main.cpp:129:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < l.size(); i++) ~~^~~~~~~~~~ main.cpp:136:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pos + 1 < l.size() && l[pos + 1].first - timer < EPS) ~~~~~~~~^~~~~~~~~~