Submission #439200

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
439200	2021-06-29 11:32:08	FSYo	Fountain Parks (IOI21_parks)	C++17	70 / 100	803 ms	138480 KiB

parks

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#include<bits/stdc++.h>
#include "parks.h"
#define cs const
#define pb push_back
using namespace std;
typedef vector<int> vi; 
typedef long long ll;
typedef pair<int, int> pi; 
cs int N = 4e5 + 5; 
int n, fa[N];
map<int, int> c[N], e[N];
vector<pi> E; 
int fnd(int x) {
  if(x == fa[x]) return x; 
  return fa[x] = fnd(fa[x]);
}
void mer(int a, int b) {
  if(a < 0) return;
  if(fnd(a) == fnd(b)) return;
  E.pb(pi(a, b));
  e[a][b] = e[b][a] = E.size() - 1; 
  fa[fnd(a)] = fnd(b);
}
vector<int> G[N];
int dfn[N], low[N], tim;
int s[N], top, in[N], blk[N], m;
void dfs(int x) {
  dfn[x] = low[x] = ++ tim; 
  s[++top] = x, in[x] = 1; 
 
 
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Compilation message (stderr)

parks.cpp: In function 'int construct_roads(vi, vi)':
parks.cpp:68:14: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   68 |  if(E.size() < n - 1) return 0;
      |     ~~~~~~~~~^~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 15 / 15
• Subtask 4: 20 / 20
• Subtask 5: 20 / 20
• Subtask 6: 0 / 30