Compilare: main.cpp: In function 'int euclid(int, int, int&, int&)': main.cpp:55:9: warning: unused variable 'D' [-Wunused-variable] int D = euclid(B , A % B , X0 , Y0); ^ main.cpp:59:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:64:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] FastIO , FILES; ^ main.cpp:64:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]