1 files changed, 22 insertions, 0 deletions

diff --git a/inf/zotksd/3.c b/inf/zotksd/3.c
new file mode 100644
index 0000000..b7723b1
--- /dev/null
+++ b/inf/zotksd/3.c
@@ -0,0 +1,22 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#define ABS(x) ((x) > 0 ? (x) : -(x))
+#define N unsigned long long int
+int main (void) {
+	char buf[512];
+	fgets(buf, 512, stdin);
+	N n = strtoull(buf, NULL, 10);
+	N num = 0;
+	for (N i = 1; i < ceill(sqrtl(n)); i++) {
+		if (n % i)
+			continue;
+		if (ABS(i-n/i) % 2)
+			continue;
+		num++;
+#ifndef EVAL
+		fprintf(stderr, "(%llu, %llu)\n", i, n/i);
+#endif
+	}
+	printf("%llu\n", num);
+}