diff options
Diffstat (limited to 'euler206.c')
-rw-r--r-- | euler206.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/euler206.c b/euler206.c new file mode 100644 index 0000000..2a5b007 --- /dev/null +++ b/euler206.c @@ -0,0 +1,27 @@ +#include <stdio.h> + +int test(long long t) +{ + t = t * t; + int b = 9; + while (b >= 1) { + if (t % 10 != b) + return 0; + b--; + t = t / 100; + } + return 1; +} + +int main() +{ + /* test 1{0000000..5000000}{30,70} */ + for (long long i = 10000000; i < 15000000; i++) { + long long t = i * 10 + 3; + if (test(t)) + printf("%lld0\n", t); + t = i * 10 + 7; + if (test(t)) + printf("%lld0\n", t); + } +} |