Compilare: main.cpp: In function 'void optimize(std::vector<interval>&)': main.cpp:48:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1; i<x.size(); i++) ~^~~~~~~~~ main.cpp: In function 'void find_new_intervals(int, int)': main.cpp:60:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0, j=0; i<x.size(); i++){ ~^~~~~~~~~ main.cpp:61:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (j+1 < y.size() and y[j+1].st <= x[i].dr) ~~~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:185:15: warning: unused variable 'lung' [-Wunused-variable] int maxx, lung, p1, p2; ^~~~