Submission #836311

#	Time	Username	Problem	Language	Result	Execution time	Memory
836311		rainboy	Finding Routers (IOI20_routers)	C++17	100 / 100	1 ms	340 KiB

routers

#include "routers.h"

using namespace std;

typedef vector<int> vi;

const int N = 1000;

int xx[N], cnt;

void solve(int xl, int xr, int il, int ir) {
	if (il == ir)
		return;
	if (xr - xl == 1) {
		xx[cnt++] = xl;
		return;
	}
	int xm = (xl + xr) / 2, im = use_detector(xm);
	solve(xl, xm, il, im), solve(xm, xr, im, ir);
}

vi find_routers(int l, int n, int q) {
	cnt = 0, solve(0, l, 0, n - 1);
	vi xx_(n, 0);
	for (int i = 0; i + 1 < n; i++)
		xx_[i + 1] = xx[i] * 2 - xx_[i];
	return xx_;
}

• Subtask 1: 16 / 16
• Subtask 2: 21 / 21
• Subtask 3: 23 / 23
• Subtask 4: 40 / 40