Submission #94571

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
94571	2019-01-21 02:17:32	wxh010910	Roller Coaster Railroad (IOI16_railroad)	C++17	100 / 100	439 ms	15208 KiB

railroad

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#include <bits/stdc++.h>
#include "railroad.h"
using namespace std;
class dsu {
 public:
  vector<int> p;
  int n;
  dsu(int n): n(n) {
    p.resize(n);
    for (int i = 0; i < n; ++i) {
      p[i] = i;
    }
  }
  inline int find(int x) {
    while (x != p[x]) {
      x = p[x] = p[p[x]];
    }
    return x;
  }
  inline bool unite(int x, int y) {
    x = find(x);
    y = find(y);
    if (x == y) {
      return false;
    } else {
 
 
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• Subtask 1: 11 / 11
• Subtask 2: 23 / 23
• Subtask 3: 30 / 30
• Subtask 4: 36 / 36