Thêm đề HSG lớp 9 TP Huế

1 files changed, 30 insertions, 0 deletions

diff --git a/THT/B/QG-2016/trigrid.c b/THT/B/QG-2016/trigrid.c
new file mode 100644
index 0000000..5b8606c
--- /dev/null
+++ b/THT/B/QG-2016/trigrid.c
@@ -0,0 +1,30 @@
+#include <stdio.h>
+
+
+const long long a[] = {4, 3, 5, 6, 111, 222, 3333, 4444, 55555, 666666, 7777777,
+                       88888888, 999999999, 123456789123456789,
+                       1000000000000000000};
+
+long long quadratic(long long x, char a, char b, char c)
+{
+	return a * x * x + b * x + c;
+}
+
+int main()
+{
+	char i;
+	long long k, q;
+	FILE *f;
+
+	f = fopen("TRIGRID.TXT", "w");
+
+	for (i = 0; i < 15; i++) {
+		q = a[i] % 2016;
+		k = a[i] / 2016 % 2016 * 252 * quadratic(q, 6, 10, 2);
+		fprintf(f, "%d\n", (k + quadratic(q, 2, 5, 2) * q / 8) % 2016);
+	}
+
+	fclose(f);
+
+	return 0;
+}