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Cod sursa(job #18124)
#include<stdio.h>
#define input "culori.in"
#define output "culori.out"
#define dim 101
void citire();
int rezolva();
int n, a[dim];
FILE *in, *out;
int main()
{
in = fopen (input, "r");
out = fopen (output, "w");
citire();
rezolva();
return 0;
}
void citire()
{
int i;
fscanf(in, "%d", &n);
for(i=1; i<=(n*2)-1; i++)
fscanf(in, "%d", &a[i]);
}
int rezolva()
{
int i;
for(i=1; i<n; i++)
if(a[i]!=a[n*2-i])
{
fprintf(out, "0");
return 0;
}
fprintf(out, "%d", n-1);
return 0;
}