Compilare: main.cpp: In function 'bool solve()': main.cpp:19:44: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d", &x, &y, &z, &a, &b); ^ main.cpp: In function 'int main()': main.cpp:40:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("antobroasca.in", "r", stdin); ^ main.cpp:41:44: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("antobroasca.out", "w", stdout); ^ main.cpp:44:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ main.cpp: In function 'void euclid(int, int, int, long long int&, long long int&)': main.cpp:13:7: warning: 'y0' may be used uninitialized in this function [-Wmaybe-uninitialized] x = y0; ~~^~~~ main.cpp:14:12: warning: 'x0' may be used uninitialized in this function [-Wmaybe-uninitialized] y = x0 - 1LL * (a / b) * y0; ~~~^~~~~~~~~~~~~~~~~~~~