Add NTU/{pali2,editpic}.c and update README.md

1 files changed, 68 insertions, 0 deletions

diff --git a/NTU/pali2.c b/NTU/pali2.c
new file mode 100644
index 0000000..72c9105
--- /dev/null
+++ b/NTU/pali2.c
@@ -0,0 +1,68 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+short MIN_K, *P;
+
+void putnc(char *s, short len)
+{
+	short i;
+
+	for (i = 0; i < len; i++)
+		putchar(s[i]);
+	putchar(10);
+}
+
+char palin(char *s, short len)
+{
+	short i;
+
+	for (i = 0; i < (len + 1) / 2; i++)
+		if (s[i] != s[len - i - 1])
+			return 0;
+
+	return 1;
+}
+
+void foo(char *s, short len, short k, short *p)
+{
+	short i, j;
+
+	if (palin(s, len)) {
+		MIN_K = k;
+		memcpy(P, p, k * sizeof(short));
+		return;
+	}
+
+	if (k >= MIN_K)
+		return;
+
+	for (i = len - 1; i; i--)
+		if (palin(s, i)) {
+			p[k] = p[k - 1] + i;
+			foo(s + i, len - i, k + 1, p);
+		}
+}
+
+int main()
+{
+	short n, i, *p;
+	char *s;
+
+	scanf("%hd\n", &n);
+	s = malloc(n + 1);
+	fgets(s, n + 1, stdin);
+
+	MIN_K = n;
+	P = malloc(n);
+	p = malloc(n);
+	p[0] = 0;
+	foo(s, n, 1, p);
+
+	printf("%hd\n", MIN_K);
+	for (i = 1; i < MIN_K; i++)
+		putnc(s + P[i - 1], P[i] - P[i - 1]);
+	puts(s + P[MIN_K - 1]);
+
+	return 0;
+}