oj.uz

Submission #998890

# Submission time Handle Problem Language Result Execution time Memory
998890 2024-06-14T19:19:47 Z PCTprobability Highway Tolls (IOI18_highway) C++17
30 / 100
 155 ms 19028 KB 
#include "highway.h"
#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define fi first
#define se second
vector<pair<int,int>> g[101010];
vector<pair<int,int>> t[2][101010];
void find_pair(int n, std::vector<int> p, std::vector<int> q, int a, int b) {
  int m=p.size();
  for(int i=0;i<m;i++){
    g[p[i]].push_back({q[i],i});
    g[q[i]].push_back({p[i],i});
  }
  int ok=0,ng=m;
  vector<int> w(m,0);
  int l=ask(w);
  while(abs(ok-ng)>1){
    int mid=(ok+ng)/2;
    vector<int> w2(m);
    for(int i=0;i<mid;i++) w2[i]=1;
    if(ask(w2)==l) ok=mid;
    else ng=mid;
  }
  int u=p[ok],v=q[ok],uv=ok;
  queue<int> qu;
  qu.push(u);
  qu.push(v);
  vector<int> seen(n,0);
  vector<int> d(n,0);
  vector<int> id(n,-1);
  //u,v それぞれ最短路
  seen[u]=1;
  seen[v]=2;
  while(qu.size()){
    int nv=qu.front();
    qu.pop();
    for(auto e:g[nv]){
      if(seen[e.fi]==0){
        seen[e.fi]=seen[nv];
        d[e.fi]=d[nv]+1;
        qu.push(e.fi);
        id[e.fi]=e.se;
        t[seen[e.fi]][e.fi].pb({nv,e.se});
      }
    }
  }
  int s=-1,t=-1;
  for(int ty=1;ty<=2;ty++){
    vector<pair<int,int>> vs;
    for(int i=0;i<n;i++){
      if(seen[i]==ty) vs.pb({d[i],i});
    }
    sort(vs.begin(),vs.end());
    while(vs.size()>1){
      int m2=vs.size();
      int mid=m2/2;
      vector<int> as(m,1);
      as[uv]=0;
      for(int i=0;i<n;i++) if(id[i]>=0) as[id[i]]=0;
      for(int i=mid;i<m2;i++) as[id[vs[i].se]]=1;
      int l2=ask(as);
      if(l2==l){
        for(int i=mid;i<m2;i++) vs.pop_back();
      }
      else{
        reverse(vs.begin(),vs.end());
        for(int i=0;i<mid;i++) vs.pop_back();
        reverse(vs.begin(),vs.end());
      }
    }
    if(ty==1) s=vs[0].se;
    else t=vs[0].se;
  }
  answer(s,t);
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 7512 KB Output is correct
2 Correct 3 ms 7512 KB Output is correct
3 Correct 3 ms 7420 KB Output is correct
4 Correct 3 ms 7508 KB Output is correct
5 Correct 3 ms 7512 KB Output is correct
6 Correct 3 ms 7512 KB Output is correct
7 Correct 3 ms 7512 KB Output is correct
8 Correct 3 ms 7512 KB Output is correct
9 Correct 4 ms 7512 KB Output is correct
10 Correct 3 ms 7512 KB Output is correct
11 Correct 3 ms 7512 KB Output is correct
12 Correct 3 ms 7512 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 7512 KB Output is correct
2 Correct 12 ms 8656 KB Output is correct
3 Correct 101 ms 17888 KB Output is correct
4 Correct 116 ms 16096 KB Output is correct
5 Correct 104 ms 16136 KB Output is correct
6 Correct 96 ms 16324 KB Output is correct
7 Correct 92 ms 16152 KB Output is correct
8 Correct 87 ms 16352 KB Output is correct
9 Correct 96 ms 17888 KB Output is correct
10 Correct 96 ms 16352 KB Output is correct
11 Correct 97 ms 16356 KB Output is correct
12 Correct 101 ms 17100 KB Output is correct
13 Correct 97 ms 17088 KB Output is correct
14 Correct 100 ms 17340 KB Output is correct

Subtask #3
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 8536 KB Output is correct
2 Correct 22 ms 9304 KB Output is correct
3 Correct 27 ms 10580 KB Output is correct
4 Correct 69 ms 16088 KB Output is correct
5 Correct 87 ms 15960 KB Output is correct
6 Correct 75 ms 16208 KB Output is correct
7 Correct 72 ms 17344 KB Output is correct
8 Correct 74 ms 15840 KB Output is correct
9 Incorrect 87 ms 16100 KB Output is incorrect: {s, t} is wrong.
10 Halted 0 ms 0 KB -

Subtask #4
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 7512 KB Output is correct
2 Correct 12 ms 8336 KB Output is correct
3 Correct 73 ms 14360 KB Output is correct
4 Correct 103 ms 16092 KB Output is correct
5 Correct 97 ms 18020 KB Output is correct
6 Correct 90 ms 16100 KB Output is correct
7 Correct 91 ms 17888 KB Output is correct
8 Correct 90 ms 17928 KB Output is correct
9 Incorrect 95 ms 16096 KB Output is incorrect: {s, t} is wrong.
10 Halted 0 ms 0 KB -

Subtask #5
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 8536 KB Output is correct
2 Correct 14 ms 8708 KB Output is correct
3 Correct 121 ms 16800 KB Output is correct
4 Correct 131 ms 18140 KB Output is correct
5 Correct 154 ms 18400 KB Output is correct
6 Correct 154 ms 17748 KB Output is correct
7 Correct 146 ms 17892 KB Output is correct
8 Correct 148 ms 18136 KB Output is correct
9 Correct 124 ms 15652 KB Output is correct
10 Correct 101 ms 14848 KB Output is correct
11 Correct 111 ms 16208 KB Output is correct
12 Correct 145 ms 17336 KB Output is correct
13 Correct 151 ms 17484 KB Output is correct
14 Correct 149 ms 17948 KB Output is correct
15 Correct 148 ms 19004 KB Output is correct
16 Correct 130 ms 16456 KB Output is correct
17 Correct 91 ms 18380 KB Output is correct
18 Correct 92 ms 16036 KB Output is correct
19 Correct 102 ms 18636 KB Output is correct
20 Correct 91 ms 15976 KB Output is correct
21 Correct 140 ms 18452 KB Output is correct

Subtask #6
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 8536 KB Output is correct
2 Correct 16 ms 8784 KB Output is correct
3 Correct 108 ms 16676 KB Output is correct
4 Correct 117 ms 16764 KB Output is correct
5 Correct 125 ms 17128 KB Output is correct
6 Correct 150 ms 18348 KB Output is correct
7 Correct 107 ms 16800 KB Output is correct
8 Correct 112 ms 17016 KB Output is correct
9 Correct 121 ms 17688 KB Output is correct
10 Correct 139 ms 17892 KB Output is correct
11 Correct 144 ms 18288 KB Output is correct
12 Correct 146 ms 18388 KB Output is correct
13 Correct 106 ms 15028 KB Output is correct
14 Correct 106 ms 15484 KB Output is correct
15 Correct 113 ms 15224 KB Output is correct
16 Correct 108 ms 15476 KB Output is correct
17 Correct 105 ms 15048 KB Output is correct
18 Correct 106 ms 15068 KB Output is correct
19 Correct 155 ms 17440 KB Output is correct
20 Correct 144 ms 18680 KB Output is correct
21 Correct 144 ms 17932 KB Output is correct
22 Correct 142 ms 18076 KB Output is correct
23 Correct 147 ms 18156 KB Output is correct
24 Correct 152 ms 18036 KB Output is correct
25 Correct 150 ms 19020 KB Output is correct
26 Correct 141 ms 19028 KB Output is correct
27 Correct 93 ms 18524 KB Output is correct
28 Correct 90 ms 15748 KB Output is correct
29 Correct 89 ms 18896 KB Output is correct
30 Incorrect 86 ms 15816 KB Output is incorrect: {s, t} is wrong.
31 Halted 0 ms 0 KB -