Submission #60561

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
60561	2018-07-24 10:53:50	aome	Parachute rings (IOI12_rings)	C++17	100 / 100	1504 ms	115900 KiB

rings

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#include <bits/stdc++.h>
using namespace std;
const int N = 1000005;
int n;
int szCircle;
int sz[N], par[N];
bool noSolution;
vector<int> G[N];
vector< pair<int, int> > E;
struct DSU {
  int root;
  int valid;
  int par[N];
  int deg[N];
  int find(int u) { return u == par[u] ? u : par[u] = find(par[u]); }
  void join(int u, int v) { par[find(u)] = find(v); }
  void add(int u, int v) {
    if (!valid || u == root || v == root) return;
    int ru = find(u), rv = find(v);
    if (deg[u] == 2 || deg[v] == 2 || ru == rv) {
      valid = 0; return;
    }
    deg[u]++, deg[v]++;
 
 
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Compilation message (stderr)

rings.cpp: In function 'void Link(int, int)':
rings.cpp:61:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i = 0; i < vec.size(); ++i) vec[i].add(A, B);
                   ~~^~~~~~~~~~~~
rings.cpp: In function 'int CountCritical()':
rings.cpp:86:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i = 0; i < vec.size(); ++i) res += vec[i].valid;
                   ~~^~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 17 / 17
• Subtask 3: 18 / 18
• Subtask 4: 14 / 14
• Subtask 5: 31 / 31