Compilare: main.cpp:7:29: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] const long long INF = 1<<30 - 1; ~~~^~~ main.cpp: In function 'int main()': main.cpp:38:24: warning: 'dr' may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<st<<" "<<dr<<" "<<max_sum<<'\n'; ^~~ main.cpp:38:15: warning: 'st' may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<st<<" "<<dr<<" "<<max_sum<<'\n'; ^~~