Compilare: main.cpp: In function 'void calc()': main.cpp:13:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for(int j = 1; j < ancestors[0].size(); j++){ | ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int nth_ancestor(int, int)': main.cpp:24:40: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | while((1 << (j+1)) <= p && j+1 < ancestors[0].size()) j++; | ~~~~^~~~~~~~~~~~~~~~~~~~~