Compilare: main.cpp: In function 'void init(std::__cxx11::string)': main.cpp:32:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(; i < s.size(); i++) ~~^~~~~~~~~~ main.cpp: In function 'std::vector<long long int> reuniune(std::vector<long long int>, std::vector<long long int>)': main.cpp:57:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i1 < v1.size() && i2 < v2.size()){ ~~~^~~~~~~~~~~ main.cpp:57:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i1 < v1.size() && i2 < v2.size()){ ~~~^~~~~~~~~~~ main.cpp:71:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i1 < v1.size()) ~~~^~~~~~~~~~~ main.cpp:73:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i2 < v2.size()) ~~~^~~~~~~~~~~ main.cpp: In function 'std::vector<long long int> inters(std::vector<long long int>, std::vector<long long int>)': main.cpp:84:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i1 < v1.size() && i2 < v2.size()){ ~~~^~~~~~~~~~~ main.cpp:84:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i1 < v1.size() && i2 < v2.size()){ ~~~^~~~~~~~~~~