Compilare: main.cpp: In function 'bool ok(long long int)': main.cpp:23:15: warning: unused variable 'a' [-Wunused-variable] long long a, b, p, put=0; ^ main.cpp:23:18: warning: unused variable 'b' [-Wunused-variable] long long a, b, p, put=0; ^ main.cpp:23:21: warning: unused variable 'p' [-Wunused-variable] long long a, b, p, put=0; ^ main.cpp:23:24: warning: unused variable 'put' [-Wunused-variable] long long a, b, p, put=0; ^~~ main.cpp:24:10: warning: unused variable 'k' [-Wunused-variable] bool k=true; ^ main.cpp: In function 'int main()': main.cpp:41:36: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lld%lld", &p, &q); ^