Submission #219299

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
219299	2020-04-05 06:16:55	maruii	Capital City (JOI20_capital_city)	C++14	100 / 100	891 ms	33132 KiB

capital_city

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#include <bits/stdc++.h>
using namespace std;
#define eack emplace_back
int N, K, C[200001], ans, A[200001], B[200001];
vector<int> edge[200001];
bool vis[200001];
int sz[200001];
int szf(int x, int p) {
  sz[x] = 1;
  for (auto i : edge[x]) if (i != p && !vis[i]) sz[x] += szf(i, x);
  return sz[x];
}
int get_cen(int x, int p, int t) {
  for (auto i : edge[x]) if (i != p && !vis[i] && sz[i] >= t) return get_cen(i, x, t);
  return x;
}
bool ban[200001], chk[200001], vis2[200001];
vector<int> clr, vec[200001];
int par[200001];
void dfs(int x, int p) {
  par[x] = p;
  clr.eack(C[x]);
  vec[C[x]].eack(x);
  ++B[C[x]];
  chk[C[x]] = vis2[x] = 0;
  for (auto i : edge[x]) if (i != p && !vis[i]) dfs(i, x);
}
 
 
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Compilation message (stderr)

capital_city.cpp: In function 'void cd(int)':
capital_city.cpp:33:30: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  x = get_cen(x, x, szf(x, x) + 1 >> 1);
                    ~~~~~~~~~~^~~

• Subtask 1: 1 / 1
• Subtask 2: 10 / 10
• Subtask 3: 30 / 30
• Subtask 4: 59 / 59