Search between two vectors

I am doing a project for a course, but I have some problems. The problem to overcome is, in a text file, consisting of id \t and a sequence of 2048 fixed '0' and '1' , insert a sequence and search for the most similar elements.

My code has only one search algorithm, but that does not solve the problem, because if the string entered is not the same as the one in the file, it does not find a macth .

#include <stdio.h>
#include <stdlib.h>
//#include "ler.h"

int pesquisa(){

    int n,*s,i,*c,a,j;
    FILE *fp;
    int *v;
    fp = fopen("tesste.txt", "r");
    v=(int*)malloc(sizeof(int));

    while(!feof(fp)){
        fscanf(fp,"\t%d",&v);
    }

    //printf("Valor n %d\n",v);
    //scanf("%d",&n);

    s=(int*)malloc(sizeof(int));
    c=(int*)malloc(sizeof(int));

    printf("Introduza a sequencia e tamanho da seq\n");

    scanf("%d",&a);

    for(j=0;j<a;j++){
        scanf("%d\n",&s[j]);
    }

    for(i=0;i<a;i++){
        if(s[i]==v[i])
            //printf("%d",a);
            //c[i]=s[i];
            return (1);
         else
            return (0);
    }

    // printf("%d",c);

    free(v);
    free(s);
    free(c);

    fclose(fp);

    return 0;

}