Compilare: main.cpp: In function 'long long unsigned int check(long long int)': main.cpp:26:38: warning: comparison of integer expressions of different signedness: 'long long unsigned int' and 'long long int' [-Wsign-compare] 26 | for (unsigned long long i = 1; i < k; i++) | ~~^~~ main.cpp:30:38: warning: comparison of integer expressions of different signedness: 'long long unsigned int' and 'long long int' [-Wsign-compare] 30 | for (unsigned long long i = k; i <= n; i++) | ~~^~~~ main.cpp: In function 'void solve()': main.cpp:43:38: warning: comparison of integer expressions of different signedness: 'long long unsigned int' and 'long long int' [-Wsign-compare] 43 | for (unsigned long long i = 1; i <= n; i++) | ~~^~~~