oj.uz

Submission #1034771

# Submission time Handle Problem Language Result Execution time Memory
1034771 2024-07-25T17:46:56 Z aymanrs Highway Tolls (IOI18_highway) C++14
12 / 100
 291 ms 262144 KB 
#include "highway.h"
#include <bits/stdc++.h>
using namespace std;
struct node {
  int p;
  vector<pair<node*, int>> l;
  int d;
};
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 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);
  }
  vector<int> w(m, 0);
  long long dis = ask(w)/A;
  if(tsub){
    int l = 0, r = N-1, mid;
    while(l<r){
      mid = l+r>>1;
      for(int i = l;i < mid;i++) w[i]=1;
      long long re = ask(w);
      for(int i = l;i < mid;i++) w[i]=0;
      if(re > dis*A) r=mid-1;
      else l = mid;
    }
    answer(l,l+dis);
    return;
  }
  dfs(&g[0], NULL, 0);
  vector<pair<int, int>> v;
  for(int i = 1;i < N;i++) if(g[i].d == dis) v.emplace_back(g[i].p, i);
  int l = 0, r = v.size()-1, mid;
  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(0, v[l].second);
}

Compilation message

highway.cpp: In function 'void dfs(node*, node*, int)':
highway.cpp:11:12: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   11 |   for(auto [c,x] : n->l){
      |            ^
highway.cpp: In function 'void find_pair(int, std::vector<int>, std::vector<int>, int, int)':
highway.cpp:21:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |   for(int i = 0;i < U.size();i++){
      |                 ~~^~~~~~~~~~
highway.cpp:31:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   31 |       mid = l+r>>1;
      |             ~^~
highway.cpp:46:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   46 |     mid = l+r>>1;
      |           ~^~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1 ms 512 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 1 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 1 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 7 ms 1368 KB Output is correct
3 Correct 88 ms 10540 KB Output is correct
4 Correct 72 ms 10524 KB Output is correct
5 Correct 60 ms 10536 KB Output is correct
6 Correct 78 ms 10336 KB Output is correct
7 Correct 68 ms 10320 KB Output is correct
8 Correct 104 ms 10552 KB Output is correct
9 Correct 65 ms 10332 KB Output is correct
10 Correct 91 ms 10552 KB Output is correct
11 Correct 81 ms 11000 KB Output is correct
12 Correct 72 ms 11088 KB Output is correct
13 Correct 81 ms 11052 KB Output is correct
14 Correct 77 ms 10576 KB Output is correct

Subtask #3
0 / 6.0

# Verdict Execution time Memory Grader output
1 Runtime error 9 ms 1368 KB Execution killed with signal 13
2 Halted 0 ms 0 KB -

Subtask #4
0 / 33.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 344 KB Output is incorrect: {s, t} is wrong.
2 Halted 0 ms 0 KB -

Subtask #5
0 / 18.0

# Verdict Execution time Memory Grader output
1 Runtime error 291 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 256 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -