Submission #53631

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
53631	2018-06-30 14:57:21	baactree	Regions (IOI09_regions)	C++17	80 / 100	7477 ms	131072 KiB

regions

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#include <bits/stdc++.h>
using namespace std;
int n, r, q;
vector<int> adj[200005];
int arr[200005];
const int sz = 1000;
int cache[sz][25005];
pair<int,int> cnt[25005];
int inv[25005];
int le[200005], ri[200005];
vector<int> idx[25005];
vector<pair<int, int> > vec[25005];
int vn;
void dfs(int now, int par) {
  idx[arr[now]].push_back(vn);
  le[now] = vn++;
  for (auto &there : adj[now]) {
    if (there == par)continue;
    dfs(there, now);
  }
  ri[now] = vn++;
  vec[arr[now]].emplace_back(le[now], ri[now]);
}
int solve(int r1, int r2) {
  int &ret = cache[inv[r1]][r2];
  if (ret != -1) return ret;
  ret = 0;
  for (auto x : vec[r1]) {
    int le = x.first;
    int ri = x.second;
 
 
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XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Compilation message (stderr)

regions.cpp: In function 'int main()':
regions.cpp:36:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d", &n, &r, &q);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~
regions.cpp:37:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &arr[1]);
  ~~~~~^~~~~~~~~~~~~~~
regions.cpp:41:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &a, &b);
   ~~~~~^~~~~~~~~~~~~~~~
regions.cpp:58:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &a, &b);
   ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 65 / 85