Submission #959286

#	Time	Username	Problem	Language	Result	Execution time	Memory
959286		hyakup	Roller Coaster Railroad (IOI16_railroad)	C++17	0 / 100	152 ms	17584 KiB

railroad

#include <bits/stdc++.h>
#include "railroad.h"
using namespace std;
#define ll long long

const ll inf = 1e9 + 10;

ll plan_roller_coaster( vector<int> ini, vector<int> fim ){
    int n = ini.size();
    set<pair<int, int>> s;
    vector<int> marc(n);
    for( int i = 0; i < n; i++ ) s.insert({ ini[i], i });
    s.insert({ inf, n });
    int cur = s.begin()->second; s.erase(s.begin());
    while( cur != n ){
      auto [pos, viz] = *s.lower_bound({fim[cur], -1});
      marc[cur] = true; s.erase({ pos, viz });
      cur = viz;
    }
    for( int i = 0; i < n; i++ ) if( marc[i] == 0 ) return 1;
    return 0;
}

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