Compilare: main.cpp: In function 'int main()': main.cpp:38:23: warning: comparison of integer expressions of different signedness: 'int' and 'long long unsigned int' [-Wsign-compare] 38 | for(int i=1; i<= x; i++,l=1-l) | ~^~~~ main.cpp:32:30: warning: unused variable 'j' [-Wunused-variable] 32 | unsigned long long x, i, j, y; | ^