Submission #1239749

#	Time	Username	Problem	Language	Result	Execution time	Memory
1239749		SalihSahin	기지국 (IOI20_stations)	C++20	0 / 100	305 ms	548 KiB

stations

#include "bits/stdc++.h"
#include "stations.h"
using namespace std;

/*
static int max_label = 0;
static int r, n, k, q;
static std::vector<int> u, v, labels, answers;
static std::map<int, int> reverse_labels;
static std::vector<std::vector<int>> adjlist;
static int s, t, w;
static std::vector<int> c;
*/
vector<int> out;
vector<int> adj[1000];
int tval;

void dfs(int node, int par){
   for(auto itr: adj[node]){
      if(itr == par) continue;
      dfs(itr, node);
   }
   out[node] = tval++;
}

vector<int> label(int n, int k, vector<int> u, vector<int> v) {
   out.assign(n, 0);
   tval = 0;
   for(int i = 0; i < 1000; i++){
      adj[i].clear();
   }
   for(int i = 0; i < n-1; i++){
      adj[u[i]].push_back(v[i]);
      adj[v[i]].push_back(u[i]);
   }
   dfs(0, 0);

   int now = 0;
   vector<int> labels = out;
   /*
   for(int i = 0; i < n; i++){
      cout<<i<<" -> "<<labels[i]<<endl;
   }*/

   return labels;
}

int find_next_station(int s, int t, vector<int> c) {
   if(c[c.size()-1] <= t) return c[c.size()-1];
   auto k = *lower_bound(c.begin(), c.end(), t);
   return k;
}

/*
int main() {
   assert(scanf("%d", &r) == 1);
   for (int tc = 0; tc < r; tc++) {
      assert(scanf("%d%d", &n, &k) == 2);
      u.resize(n - 1);
      v.resize(n - 1);
      adjlist.clear();
      adjlist.resize(n);
      for (int i = 0; i < n - 1; i++) {
         assert(scanf("%d%d", &u[i], &v[i]) == 2);
         adjlist[u[i]].push_back(v[i]);
         adjlist[v[i]].push_back(u[i]);
      }
      labels = label(n, k, u, v);
      if ((int)labels.size() != n) {
         printf("Number of labels not equal to %d\n", n);
         exit(0);
      }
      reverse_labels.clear();
      for (int i = 0; i < n; i++) {
         if (labels[i] < 0 || labels[i] > k) {
            printf("Label not in range 0 to %d\n", k);
            exit(0);
         }
         if (reverse_labels.find(labels[i]) != reverse_labels.end()) {
            printf("Labels not unique\n");
            exit(0);
         }
         reverse_labels[labels[i]] = i;
         if (labels[i] > max_label) {
            max_label = labels[i];
         }
      }
      assert(scanf("%d", &q) == 1);
      for (int i = 0; i < q; i++) {
         assert(scanf("%d%d%d", &s, &t, &w) == 3);
         c.clear();
         for (int v : adjlist[s]) {
            c.push_back(labels[v]);
         }
         std::sort(c.begin(), c.end());
         int answer = find_next_station(labels[s], labels[t], c);
         if (!std::binary_search(c.begin(), c.end(), answer)) {
            printf("Label %d returned by find_next_station not found in c\n", answer);
            exit(0);
         }
         answers.push_back(reverse_labels[answer]);
      }
   }

   printf("is bitti \n"); // ben koydum

   printf("%d\n", max_label);
   for (int index : answers) {
      printf("%d\n", index);
   }
   exit(0);
}
*/

• Subtask 1: 0 / 5
• Subtask 2: 0 / 8
• Subtask 3: 0 / 16
• Subtask 4: 0 / 10
• Subtask 5: 0 / 61