oj.uz

Submission #1034801

# Submission time Handle Problem Language Result Execution time Memory
1034801 2024-07-25T18:34:14 Z aymanrs Highway Tolls (IOI18_highway) C++17
51 / 100
 201 ms 262144 KB 
#include "highway.h"
#include <bits/stdc++.h>
using namespace std;
struct node {
  int p;
  vector<pair<node*, int>> l;
  int d, id;
};
void dfs(node* n, node* p, int d){
  n->d = d;
  for(auto [c,x] : n->l){
    if(c==p) continue;
    c->p = x;
    dfs(c, n, d+1);
  }
}
void zfs(node* n, node* p, vector<node*>& o){
  for(auto [c,x] : n->l){
    if(c!=p) zfs(c, n, o);
  }
  o.push_back(n);
}
void find_pair(int N, std::vector<int> U, std::vector<int> V, int A, int B) {
  node g[N];
  int m = U.size();
  bool tsub = true;
  for(int i = 0;i < U.size();i++){
    tsub &= U[i]==i && V[i]==i+1;
    g[U[i]].l.emplace_back(&g[V[i]], i);
    g[V[i]].l.emplace_back(&g[U[i]], i);
  }
  for(int i = 0;i < N;i++) g[i].id = i;
  vector<int> w(m, 0);vector<node*> o;
  zfs(&g[0], NULL, o);
  long long dis = ask(w)/A;
  int l = 0, r = N-1, mid;
  while(l<r){
    mid=l+r>>1;
    for(int i = l;i <= mid;i++){
      for(auto [c,x] : o[i]->l) w[x]=1;
    }
    long long re = ask(w);
    for(int i = l;i <= mid;i++){
      for(auto [c,x] : o[i]->l) w[x]=0;
    }
    if(re>dis*A){
      r = mid;
    } else {
      l=mid+1;
    }
  }
  int s = o[l]->id;
  dfs(o[l], NULL, 0);
  vector<pair<int, int>> v;
  for(int i = 0;i < N;i++) if(g[i].d == dis) v.emplace_back(g[i].p, i);
  l = 0; r = v.size()-1;
  while(l<r){
    mid = l+r>>1;
    for(int i = l;i <= mid;i++) w[v[i].first] = 1;
    long long re = ask(w);
    for(int i = l;i <= mid;i++) w[v[i].first] = 0;
    if(re > dis*A){
      r = mid;
    } else l = mid+1;
  }
  answer(s, v[l].second);
}

Compilation message

highway.cpp: In function 'void find_pair(int, std::vector<int>, std::vector<int>, int, int)':
highway.cpp:27:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |   for(int i = 0;i < U.size();i++){
      |                 ~~^~~~~~~~~~
highway.cpp:38:10: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   38 |     mid=l+r>>1;
      |         ~^~
highway.cpp:58:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   58 |     mid = l+r>>1;
      |           ~^~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 596 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 0 ms 344 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 8 ms 1624 KB Output is correct
3 Correct 87 ms 11464 KB Output is correct
4 Correct 86 ms 11648 KB Output is correct
5 Correct 80 ms 11464 KB Output is correct
6 Correct 81 ms 11480 KB Output is correct
7 Correct 80 ms 11464 KB Output is correct
8 Correct 83 ms 11464 KB Output is correct
9 Correct 80 ms 11484 KB Output is correct
10 Correct 81 ms 11424 KB Output is correct
11 Correct 80 ms 12764 KB Output is correct
12 Correct 78 ms 13272 KB Output is correct
13 Correct 79 ms 13012 KB Output is correct
14 Correct 93 ms 12248 KB Output is correct

Subtask #3
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 2136 KB Output is correct
2 Correct 16 ms 4184 KB Output is correct
3 Correct 23 ms 5844 KB Output is correct
4 Correct 72 ms 16604 KB Output is correct
5 Correct 67 ms 16584 KB Output is correct
6 Correct 61 ms 16588 KB Output is correct
7 Correct 66 ms 16612 KB Output is correct
8 Correct 73 ms 16596 KB Output is correct
9 Correct 67 ms 16616 KB Output is correct

Subtask #4
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 8 ms 1624 KB Output is correct
3 Correct 55 ms 9280 KB Output is correct
4 Correct 80 ms 11476 KB Output is correct
5 Correct 89 ms 11464 KB Output is correct
6 Correct 82 ms 11472 KB Output is correct
7 Correct 74 ms 11240 KB Output is correct
8 Correct 75 ms 11472 KB Output is correct
9 Correct 82 ms 11464 KB Output is correct
10 Correct 98 ms 11476 KB Output is correct
11 Correct 74 ms 12236 KB Output is correct
12 Correct 91 ms 13512 KB Output is correct
13 Correct 87 ms 13016 KB Output is correct
14 Correct 86 ms 13544 KB Output is correct
15 Correct 86 ms 11484 KB Output is correct
16 Correct 69 ms 11464 KB Output is correct
17 Correct 89 ms 13036 KB Output is correct
18 Correct 81 ms 12744 KB Output is correct
19 Correct 71 ms 11480 KB Output is correct
20 Correct 75 ms 13784 KB Output is correct
21 Correct 70 ms 12736 KB Output is correct
22 Correct 77 ms 12736 KB Output is correct
23 Correct 80 ms 11584 KB Output is correct
24 Correct 77 ms 12340 KB Output is correct
25 Correct 109 ms 16080 KB Output is correct

Subtask #5
0 / 18.0

# Verdict Execution time Memory Grader output
1 Runtime error 201 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #6
0 / 31.0

# Verdict Execution time Memory Grader output
1 Runtime error 200 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -