Compilare: main.cpp: In function 'std::vector<std::pair<int, int> > Primes::factorize(int)': main.cpp:21:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for(int k = 0; k < primes.size() && x > N_MAX && primes[k] * primes[k] <= x; k++) if(x % primes[k] == 0) { | ~~^~~~~~~~~~~~~~~ main.cpp: In lambda function: main.cpp:37:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | if(k == fact.size()) return div.push_back(curr); | ~~^~~~~~~~~~~~~~ main.cpp: In function 'void walk(int, bool)': main.cpp:71:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 71 | if(k == dim.size()) { | ~~^~~~~~~~~~~~~ In file included from /usr/include/c++/10/cassert:44, from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33, from main.cpp:1: main.cpp: In function 'int main()': main.cpp:122:57: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__normal_iterator<int*, std::vector<int> >::difference_type' {aka 'long int'} and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 122 | assert(unique(sol.begin(), sol.end()) - sol.begin() == path.size()); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~