Compilare: main.cpp: In function 'int main()': main.cpp:63:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (N > lung_sir) ~~^~~~~~~~~~ main.cpp:79:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (N > lung_sir) ~~^~~~~~~~~~ main.cpp:122:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (N <= lung_sir) ~~^~~~~~~~~~~ main.cpp:151:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 1; j<= N; j++) ~^~~~ main.cpp:24:41: warning: variable 'aux' set but not used [-Wunused-but-set-variable] unsigned long long nr, ap_caracter, aux; ^~~