Compilare: main.cpp: In function 'void bkt(int, int, int)': main.cpp:23:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Prime>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | if(id == desc.size()){ | ~~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:64:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Prime>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 64 | for(int i = 0; i < desc.size(); i ++) | ~~^~~~~~~~~~~~~ main.cpp:71:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 71 | for(i = 0; i < r.size(); i ++) | ~~^~~~~~~~~~ main.cpp:39:13: warning: unused variable 'a' [-Wunused-variable] 39 | long long a, b, c, i; | ^ main.cpp:39:19: warning: unused variable 'c' [-Wunused-variable] 39 | long long a, b, c, i; | ^