1 files changed, 41 insertions, 0 deletions
diff --git a/ntu/chenhlech.c b/ntu/chenhlech.c
new file mode 100644
index 0000000..27490bb
--- /dev/null
+++ b/ntu/chenhlech.c
@@ -0,0 +1,41 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+unsigned long long delta(long *a, short len)
+{
+	unsigned long long sum = 0, val, val0, left = 0;
+	short i;
+
+	for (i = 0; i <= len; i++)
+		sum += a[i];
+	val = sum;
+
+	for (i = 0; i < len; i++) {
+		left += a[i];
+		val0 = llabs(sum - left * 2);
+		if (val0 < val)
+			val = val0;
+	}
+
+	return val;
+}
+
+int main()
+{
+	short n, q, *u, *v, i;
+	scanf("%hd %hd", &n, &q);
+
+	long *a = malloc(n * 4);
+	for (i = 0; i < n; i++)
+		scanf("%ld", &a[i]);
+
+	u = malloc(q * 2);
+	v = malloc(q * 2);
+	for (i = 0; i < q; i++)
+		scanf("%hd %hd", &u[i], &v[i]);
+
+	for (i = 0; i < q; i++)
+		printf("%lld\n", delta(a + u[i] - 1, v[i] - u[i]));
+
+	return 0;
+}