Compilare: main.cpp: In function 'int main()': main.cpp:124:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < l.size(); i++) ~~^~~~~~~~~~ main.cpp:131:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pos + 1 < l.size() && l[pos + 1].first - timer < EPS) ~~~~~~~~^~~~~~~~~~