Submission #777821

#	Time	Username	Problem	Language	Result	Execution time	Memory
777821		JoenPoenMan	Finding Routers (IOI20_routers)	C++17	39 / 100	2 ms	340 KiB

routers

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

using namespace std;

std::vector<int> find_routers(int l, int n, int q) {
    std::vector<int> sna;
    int curr = n-1;
    int low = 0, high = l-2, mid;
    while (curr != 0) {
        while (low != high) {
            mid = (low+high+1)/2;
            if (use_detector(mid) >= curr) high = mid-1;
            else low = mid;
        }
        sna.push_back(low);
        high = low-2;
        low = 0;
        curr--;
    }
    vector<int> ans;
    ans.push_back(0);
    for (int i = sna.size()-1; i >= 0; i--) {
        ans.push_back(2*sna[i] - ans.back());
    }

    return ans;
}

• Subtask 1: 16 / 16
• Subtask 2: 0 / 21
• Subtask 3: 23 / 23
• Subtask 4: 0 / 40