Submission #623586

#	Time	Username	Problem	Language	Result	Execution time	Memory
623586		jophyyjh	Finding Routers (IOI20_routers)	C++14	70.13 / 100	2 ms	340 KiB

routers

/**
 * Not hard.
 * 
 * Steps needed:  n * log_2(l)
 * Implementation 1
*/

#include <bits/stdc++.h>
#include "routers.h"

typedef std::vector<int>  vec;


vec find_routers(int l, int n, int q) {
    vec ans = {0};
    for (int i = 0; i < n - 1; i++) {
        int prev = ans.back();
        int a = prev, b = l;
        while (a < b) {
            int mid = (a + b + 1) / 2;
            if (use_detector(mid) == i)
                a = mid;
            else
                b = mid - 1;
        }
        ans.push_back(2 * a - prev);
    }
    return ans;
}

• Subtask 1: 16 / 16
• Subtask 2: 21 / 21
• Subtask 3: 23 / 23
• Subtask 4: 10.1344 / 40