#include <cstdio>

int main(void) {
	FILE *fin = fopen("vanatoare.in", "rt");
	FILE *fout = fopen("vanatoare.out", "wt");
	int N, T, x, y, i;

	fscanf(fin, " %d %d", &N, &T);

	fprintf(fout, "%d\n", N);

	for (i = 0; i < N; ++i) {
		fscanf(fin, " %d %d", &x, &y);
		fprintf(fout, "%d\n", x);
	}

	fclose(fin);
	fclose(fout);
}