Submission #599951

#	Time	Username	Problem	Language	Result	Execution time	Memory
599951		Lucpp	Rail (IOI14_rail)	C++17	30 / 100	78 ms	708 KiB

rail

#include "rail.h"
#include <bits/stdc++.h>
using namespace std;

void findLocation(int n, int first, int location[], int stype[]){
    stype[0] = 1;
    location[0] = first;
    vector<pair<int, int>> dist0;
    for(int i = 1; i < n; i++){
        int d = getDistance(0, i);
        dist0.emplace_back(d, i);
    }
    sort(dist0.begin(), dist0.end());
    stype[dist0[0].second] = 2;
    location[dist0[0].second] = first+dist0[0].first;
    map<int, int> C, D;
    C.emplace(first, 0);
    D.emplace(location[dist0[0].second], dist0[0].second);
    for(int i = 1; i < n-1; i++){
        auto [d0, ind] = dist0[i];
        int dc = getDistance(C.begin()->second, ind);
        int dd = getDistance(D.rbegin()->second, ind);
        int rd = D.rbegin()->first;
        int rc = C.rbegin()->first;
        int ld = D.begin()->first;
        int lc = C.begin()->first;
        if(first+d0 == rd+dd-2*(rd-rc)){
            stype[ind] = 2;
            location[ind] = first+d0;
            D.emplace(first+d0, ind);
        }
        else if(rd-dd > first){
            stype[ind] = 1;
            location[ind] = rd-dd;
            C.emplace(rd-dd, ind);
        }
        else{
            d0 = first-(rd-dd);
            if(first-d0 == lc-dc+2*(ld-lc)){
                stype[ind] = 1;
                location[ind] = first-d0;
                C.emplace(first-d0, ind);
            }
            else{
                stype[ind] = 2;
                location[ind] = lc+dc;
                D.emplace(lc+dc, ind);
            }
        }
    }
}

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