Compilare: main.cpp: In function 'void gen(long long int, long long int)': main.cpp:27:5: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(sp != 1) ^ main.cpp: In function 'int main()': main.cpp:47:16: warning: unused variable 'j' [-Wunused-variable] long long i, j; ^ main.cpp:49:26: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lld", &n); ^