Compilare: user.c: In function ‘fast_exp’: user.c:4:10: warning: type of ‘n’ defaults to ‘int’ [enabled by default] unsigned fast_exp(n, p, m) ^ user.c:4:10: warning: type of ‘p’ defaults to ‘int’ [enabled by default] user.c:4:10: warning: type of ‘m’ defaults to ‘int’ [enabled by default] user.c: In function ‘main’: user.c:25:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("lgput.in", "r", stdin); ^ user.c:26:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("lgput.out", "w", stdout); ^ user.c:28:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%u %u", &N, &P); ^