Compilare: main.cpp: In function 'int main()': main.cpp:51:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | for (i = 1; i < vfractii.size(); i++) { | ~~^~~~~~~~~~~~~~~~~ main.cpp:26:27: warning: unused variable 'gcd' [-Wunused-variable] 26 | int n, i, j, sol, a, b, gcd, val, cnt; | ^~~ main.cpp:26:32: warning: unused variable 'val' [-Wunused-variable] 26 | int n, i, j, sol, a, b, gcd, val, cnt; | ^~~