Compilare: main.cpp: In function 'void solve2()': main.cpp:38:12: warning: unused variable 'j' [-Wunused-variable] int i, j, Max = 0, L = 1, u, Max_nou, l; ^ main.cpp:38:31: warning: unused variable 'u' [-Wunused-variable] int i, j, Max = 0, L = 1, u, Max_nou, l; ^ main.cpp:39:10: warning: unused variable 'ok' [-Wunused-variable] bool ok; ^~ main.cpp:87:19: warning: 'l' may be used uninitialized in this function [-Wmaybe-uninitialized] for (i = 1; i <= l; i++) ~~^~~~