Compilare: main.cpp: In function 'void ad(int, int, long long int)': main.cpp:22:9: warning: statement has no effect [-Wunused-value] 22 | for(i; i <= n; i = i + ub(i)) | ^ main.cpp:24:13: warning: statement has no effect [-Wunused-value] 24 | for(j; j <= Nrmax; j = j + ub(j)) | ^