Submission #103017

#	Time	Username	Problem	Language	Result	Execution time	Memory
103017		Osama_Alkhodairy	Roller Coaster Railroad (IOI16_railroad)	C++17	0 / 100	119 ms	7788 KiB

railroad

// name = railroad_gk_wa.cpp, type = cpp.g++11

#include "railroad.h"
#include <bits/stdc++.h>
 
using namespace std;
 
long long plan_roller_coaster(vector<int> s, vector<int> t) {
  int n = s.size();
  vector < pair <int, int> > e;
  for (int i = 0; i < n; i++) {
    e.push_back(make_pair(s[i], 1));
    e.push_back(make_pair(t[i], -1));
  }
  sort(e.begin(), e.end());
  int sz = e.size();
  int balance = 0;
  bool source = false;
  int beg = 0;
  while (beg < sz) {
    int end = beg;
    while (end + 1 < sz && e[end + 1].first == e[end].first) {
      end++;
    }
    for (int j = beg; j <= end; j++) {
      balance += e[j].second;
    }
    if (balance > 1) {
      return 1;
    }
    if (balance == 1) {
      if (source) {
        return 1;
      }
      balance--;
      source = true;
    }
    beg = end + 1;
  }
  return 0;
}

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