Submission #1029636

#	Time	Username	Problem	Language	Result	Execution time	Memory
1029636		12345678	Roller Coaster Railroad (IOI16_railroad)	C++17	0 / 100	445 ms	47992 KiB

railroad

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

using namespace std;

const int nx=2e5+5;

int n, T, cnts, cntt;
map<int, int> mp;
vector<pair<int, int>> v[2*nx];

long long plan_roller_coaster(std::vector<int> s, std::vector<int> t) {
    n=s.size();
    for (int i=0; i<n;i ++) mp[s[i]]=mp[t[i]]=0;
    for (auto &[x, y]:mp) y=++T;
    for (int i=0; i<n;i ++) v[mp[s[i]]].push_back({0, i}), v[mp[t[i]]].push_back({1, i}); //cout<<"mp "<<mp[s[i]]<<' '<<mp[t[i]]<<'\n';
    for (int i=2*n; i>=1; i--)
    {
        sort(v[i].begin(), v[i].end());
        for (auto x:v[i])
        {
            if (!x.first) 
            {
                //cout<<"update "<<x.second<<' '<<cnts<<'\n';
                cnts++;
            }
            else
            {
                cntt++;
                int vl=cnts;
                //if (t[x.second]<=s[x.second]) vl=cnts-1;
                //cout<<"debug "<<x.second<<' '<<vl<<' '<<cntt<<'\n';
                if (vl<cntt-1) return 1;
            }
        }
    }
    return 0;
}

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