Compilare: main.cpp: In function 'void Back(long long int, std::vector<std::pair<long long int, long long int> >, std::vector<long long int>&)': main.cpp:12:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k==dv.size()-1){ ~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:54:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long long j=1;j<divi.size();j++){ ~^~~~~~~~~~~~ main.cpp:57:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long long j=1;j<divi.size();j++){ ~^~~~~~~~~~~~ main.cpp:81:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long long j=1;j<divi.size();j++){ ~^~~~~~~~~~~~ main.cpp:87:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long long j=1;j<divi.size();j++){ ~^~~~~~~~~~~~