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#include <stdio.h>
#include <stdlib.h>
int main()
{
FILE *f = fopen("INP.TXT", "r");
int n, k, *a, i;
long long s = 0;
fscanf(f, "%d %d", &n, &k);
a = malloc(n * sizeof(int));
for (i = 0; i < n; i++) {
fscanf(f, "%d", a + i);
s += a[i];
}
fclose(f);
k = s / k;
s = 0;
for (i = 0; i < n; i++) {
s += a[i];
if (s == k)
s = 0;
}
f = fopen("OUT.TXT", "w");
fputs(s ? "NO\n" : "YES\n", f);
fclose(f);
return 0;
}
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