Compilare: main.cpp: In function 'int main()': main.cpp:36:26: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'long long int' [-Wformat=] printf("%ld\n", x % n); ^ main.cpp:29:44: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("inversmodular.in", "r", stdin); ^ main.cpp:30:46: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("inversmodular.out", "w", stdout); ^ main.cpp:32:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld", &a, &n); ^ main.cpp:36:11: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%ld\n", x % n); ~~~~~~^~~~~~~~~~~~~~~~