3526572_ac_47ms_88k.c

北大大牛代码 1240道题的原代码 超级权威

#include <stdio.h>

int main() {
	int n;
	int i;
	double a, b, c, d, x, y;

	while (scanf("%d", &n) == 1) {
		printf("%d", n);
		scanf("%lf%lf", &a, &b);
		x = a;y = b;
		for (i = 1; i < n; i++) {
			scanf("%lf%lf", &c, &d);
			printf(" %.6lf %.6lf", (a + c) / 2.0, (b + d) / 2.0);
			a = c;
			b = d;
		}
		printf(" %.6lf %.6lf\n", (a + x) / 2.0, (b + y) / 2.0);
	}
	return 0;
}