#include<stdio.h>
#include<stdlib.h>

//#define MAX_SPIDERS 100
#define MAX_BEADS 100

struct spiders
{
int thread[MAX_BEADS];
};


int main()
{
int spidersnum, beads,bead_a,bead_b,i,*threadsnum;
struct spiders spider[MAX_BEADS];


FILE *fp;
fp=fopen&#40;"input.txt","r"&#41;;
fscanf(fp,"%d",&spidersnum;);
fscanf(fp,"%d",&beads;);

threadsnum=(int *)calloc(sizeof(int),MAX_BEADS);

for (i=0; i<beads-1;i++)
 {
 fscanf(fp, "%d %d", &bead;_a, &bead;_b);
 bead_a--;bead_b--;
 spider[bead_a].thread[threadsnum[bead_a]]=bead_b;
 threadsnum[bead_a]++;
 //printf (" %d %d", bead_a, bead_b);
 }
free(threadsnum);
printf("\n%d\n", spider[0].thread[1]);

if (fp!=NULL)
 fclose(fp);
return 0;
}