69 lines
926 B
C
69 lines
926 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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short MIN_K, *P;
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void putnc(char *s, short len)
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{
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short i;
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for (i = 0; i < len; i++)
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putchar(s[i]);
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putchar(10);
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}
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char palin(char *s, short len)
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{
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short i;
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for (i = 0; i < (len + 1) / 2; i++)
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if (s[i] != s[len - i - 1])
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return 0;
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return 1;
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}
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void foo(char *s, short len, short k, short *p)
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{
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short i, j;
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if (palin(s, len)) {
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MIN_K = k;
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memcpy(P, p, k * sizeof(short));
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return;
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}
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if (k >= MIN_K)
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return;
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for (i = len - 1; i; i--)
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if (palin(s, i)) {
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p[k] = p[k - 1] + i;
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foo(s + i, len - i, k + 1, p);
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}
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}
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int main()
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{
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short n, i, *p;
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char *s;
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scanf("%hd\n", &n);
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s = malloc(n + 1);
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fgets(s, n + 1, stdin);
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MIN_K = n;
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P = malloc(n);
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p = malloc(n);
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p[0] = 0;
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foo(s, n, 1, p);
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printf("%hd\n", MIN_K);
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for (i = 1; i < MIN_K; i++)
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putnc(s + P[i - 1], P[i] - P[i - 1]);
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puts(s + P[MIN_K - 1]);
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return 0;
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}
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