Compilare: main.cpp: In function 'void rot_st(int, int)': main.cpp:16:9: warning: unused variable 'fiu_st' [-Wunused-variable] int fiu_st = L[idx][nod].first; ^~~~~~ main.cpp: In function 'int main()': main.cpp:59:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<sol[0].size();i++) ~^~~~~~~~~~~~~~