Compilare: main.cpp: In function 'int main()': main.cpp:26:15: warning: unused variable 'j' [-Wunused-variable] int st,dr,j = 1,maxii = -1; ^ main.cpp:40:31: warning: 'dr' may be used uninitialized in this function [-Wmaybe-uninitialized] out << st << " " << dr << " " << 2*maxi; ^~~ main.cpp:40:18: warning: 'st' may be used uninitialized in this function [-Wmaybe-uninitialized] out << st << " " << dr << " " << 2*maxi; ^~~