Submission #600490

#	Time	Username	Problem	Language	Result	Execution time	Memory
600490		A_D	Roller Coaster Railroad (IOI16_railroad)	C++14	0 / 100	99 ms	6196 KiB

railroad

#include "railroad.h"

#include <bits/stdc++.h>

using namespace std;


long long plan_roller_coaster(vector<int> s,vector<int> t){
    int n = (int) s.size();
    vector<pair<int,int>> s2;
    vector<int> vec;
    for(int i=0;i<n;i++){
        vec.push_back(1);
        if(t[i]<=s[i])vec[i]--;
        s2.push_back({t[i],i});
    }
    sort(s.begin(),s.end());
    reverse(s.begin(),s.end());
    sort(s2.begin(),s2.end());

    for(int i=0;i<n;i++){
        int l=0,r=n-1,h=s2[i].first,ans=-1;
        while(l<=r){
            int mid=(l+r)/2;
            if(s[mid]>=h){
                ans=mid;
                l=mid+1;
            }
            else{
                r=mid-1;
            }
        }
        vec[s2[i].second]+=ans;
    }


    sort(vec.begin(),vec.end());
    for(int i=0;i<n;i++){
        if(vec[i]<i+1)return 0;
    }
    return 1;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 23
• Subtask 3: 0 / 30
• Subtask 4: 0 / 36