Submission #63939091

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int N;
char S[64][64];
size_t len[64];
int idx[64];
int cmp(const void* x, const void* y) {
  size_t a = len[*(const int*)x], b = len[*(const int*)y];
  return a < b ? -1 : a > b;
}
int main(void) {
  int i;
  if (scanf("%d", &N) != 1) return 1;
  for (i = 0; i < N; i++) {
    if (scanf("%63s", S[i]) != 1) return 1;
    len[i] = strlen(S[i]);
    idx[i] = i;
 
 
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int N;
char S[64][64];
size_t len[64];
int idx[64];

int cmp(const void* x, const void* y) {
	size_t a = len[*(const int*)x], b = len[*(const int*)y];
	return a < b ? -1 : a > b;
}

int main(void) {
	int i;
	if (scanf("%d", &N) != 1) return 1;
	for (i = 0; i < N; i++) {
		if (scanf("%63s", S[i]) != 1) return 1;
		len[i] = strlen(S[i]);
		idx[i] = i;
	}
	qsort(idx, N, sizeof(*idx), cmp);
	for (i = 0; i < N; i++) {
		fputs(S[idx[i]], stdout);
	}
	putchar('\n');
	return 0;
}

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Judge Result