diff options
Diffstat (limited to '12/Q-VĩnhTường-2006/cau2.c')
-rw-r--r-- | 12/Q-VĩnhTường-2006/cau2.c | 39 |
1 files changed, 0 insertions, 39 deletions
diff --git a/12/Q-VĩnhTường-2006/cau2.c b/12/Q-VĩnhTường-2006/cau2.c deleted file mode 100644 index 4ad1c3b..0000000 --- a/12/Q-VĩnhTường-2006/cau2.c +++ /dev/null @@ -1,39 +0,0 @@ -#include <stdio.h> -#include <math.h> - -char prime(unsigned long long m) -{ - unsigned long i; - - for (i = 3; i <= sqrt(m); i += 2) - if (m % i == 0) - return 0; - - return 1; -} - -int main() -{ - unsigned long long n, i; - - scanf("%lld", &n); - - if (n == 1) { - puts("2"); - - return 0; - } - - i = (n % 2) ? n : n - 1; - - while (i <= 18446744073709551615ULL) { - i += 2; - - if (!prime(i)) - continue; - - printf("%lld\n", i); - - return 0; - } -} |