Compilare: main.cpp: In function 'int main()': main.cpp:42:24: warning: loop variable 'vecin' creates a copy from type 'const std::pair<int, int>' [-Wrange-loop-construct] 42 | for(const auto vecin:v[u]){ | ^~~~~ main.cpp:42:24: note: use reference type to prevent copying 42 | for(const auto vecin:v[u]){ | ^~~~~ | & main.cpp:21:12: warning: unused variable 'e' [-Wunused-variable] 21 | int i, e, s, cont=0, loc, a, b, c, d, u; | ^ main.cpp:21:15: warning: unused variable 's' [-Wunused-variable] 21 | int i, e, s, cont=0, loc, a, b, c, d, u; | ^ main.cpp:21:18: warning: unused variable 'cont' [-Wunused-variable] 21 | int i, e, s, cont=0, loc, a, b, c, d, u; | ^~~~ main.cpp:21:26: warning: unused variable 'loc' [-Wunused-variable] 21 | int i, e, s, cont=0, loc, a, b, c, d, u; | ^~~