Submission #38846

#	Time	Username	Problem	Language	Result	Execution time	Memory
38846		14kg	Rail (IOI14_rail)	C++11	30 / 100	92 ms	720 KiB

rail

#include "rail.h"
#define N 5000
#define INF 999999999

int n;
int zd[N], zero;
int rd[N], rw, r_num;
int left_num, left;
int right_num, right;

void findLocation(int _n, int _zero, int out1[], int out2[]) {
	int temp = INF;
	n = _n, zero = _zero;

	for (int i = 1; i < n; i++) {
		zd[i] = getDistance(0, i);
		if (temp > zd[i]) {
			temp = zd[i], r_num = i;
			rw = zero + temp;
		}
	}

	for (int i = 1; i < n; i++)
		if (i != r_num) rd[i] = getDistance(r_num, i);

	out1[0] = zero, out2[0] = 1;
	out1[r_num] = rw, out2[r_num] = 2;
	left_num = 0, left = zero;
	right_num = r_num, right = rw;

	for (int i = 1; i <= n; i++)
		if (i != r_num) {
			if (zd[i] + rw - zero == rd[i])
				out1[i] = zero + zd[i], out2[i] = 2;
			else if (rd[i] + rw - zero == zd[i])
				out1[i] = rw - rd[i], out2[i] = 1;

			if (out2[i] && left > out1[i])
				left = out1[i], left_num = i;
			if (out2[i] && right < out1[i])
				right = out1[i], right_num = i;
		}

	for (int i = 1; i <= n; i++)
		if (!out2[i]) {
			temp = getDistance(left_num, i);
			if (left + temp < right)
				out1[i] = left + temp, out2[i] = 2;
			else
				out1[i] = right * 2 - left - temp, out2[i] = 1;
		}
}

• Subtask 1: 8 / 8
• Subtask 2: 22 / 22
• Subtask 3: 0 / 26
• Subtask 4: 0 / 44