Compilare: user.cpp: In function ‘ubig_t kthSum(ubig_t, ubig_t)’: user.cpp:27:9: warning: unused variable ‘start’ [-Wunused-variable] ubig_t start = std::lower_bound(v, v + n, midSum - v[end - 1]) - v; ^ user.cpp: In function ‘int main()’: user.cpp:59:7: warning: unused variable ‘name’ [-Wunused-variable] char name[100]; ^ user.cpp: In function ‘ubig_t kthSum(ubig_t, ubig_t)’: user.cpp:54:1: warning: control reaches end of non-void function [-Wreturn-type] } ^