oj.uz

Submission #971976

# Submission time Handle Problem Language Result Execution time Memory
971976 2024-04-29T16:03:38 Z onlk97 Highway Tolls (IOI18_highway) C++14
51 / 100
 238 ms 262144 KB 
#include "highway.h"
#include <bits/stdc++.h>
using namespace std;
vector <pair <int,int> > g[100010];
int pa[100010],dep[100010];
vector <int> is;
void dfs(int cur,int prv,bool r){
    if (r) dep[cur]=0;
    else dep[cur]=dep[prv]+1;
    for (auto i:g[cur]){
        if (i.first!=prv){
            pa[i.first]=i.second;
            is.push_back(i.second);
            dfs(i.first,cur,0);
        }
    }
}
void find_pair(int n,vector <int> u,vector <int> v,int a,int b){
    int m=u.size();
    vector <int> tt(m,0);
    long long dist0=ask(tt);
    int l=0,r=m-1;
    while (l<r){
        int mid=(l+r)/2;
        vector <int> tp(m,0);
        for (int i=l; i<=mid; i++) tp[i]=1;
        long long dist1=ask(tp);
        if (dist0!=dist1) r=mid;
        else l=mid+1;
    }
    for (int i=0; i<m; i++){
        g[u[i]].push_back({v[i],i});
        g[v[i]].push_back({u[i],i});
    }
    is.clear();
    for (int i=0; i<n; i++) dep[i]=-1;
    dfs(u[l],v[l],1);
    vector <int> tp(m,0);
    for (int i:is) tp[i]=1;
    long long dist1=ask(tp);
    long long d=(dist1-dist0)/(1LL*(b-a));
    vector <int> cand;
    for (int i=0; i<n; i++){
        if (dep[i]==d) cand.push_back(i); 
    }
    while (cand.size()>1){
        for (int i=0; i<m; i++) tp[i]=0;
        for (int i=0; i<(cand.size()+1)/2; i++) tp[pa[cand[i]]]=1;
        dist1=ask(tp);
        vector <int> nw;
        if (dist0!=dist1){
            for (int i=0; i<(cand.size()+1)/2; i++) nw.push_back(cand[i]); 
        } else {
            for (int i=(cand.size()+1)/2; i<cand.size(); i++) nw.push_back(cand[i]);
        }
        cand=nw;
    }
    int ans=cand[0];
    is.clear();
    for (int i=0; i<n; i++) dep[i]=-1;
    dfs(v[l],u[l],1);
    for (int i=0; i<m; i++) tp[i]=0;
    for (int i:is) tp[i]=1;
    dist1=ask(tp);
    d=(dist1-dist0)/(1LL*(b-a));
    cand.clear();
    for (int i=0; i<n; i++){
        if (dep[i]==d) cand.push_back(i); 
    }
    while (cand.size()>1){
        for (int i=0; i<m; i++) tp[i]=0;
        for (int i=0; i<(cand.size()+1)/2; i++) tp[pa[cand[i]]]=1;
        dist1=ask(tp);
        vector <int> nw;
        if (dist0!=dist1){
            for (int i=0; i<(cand.size()+1)/2; i++) nw.push_back(cand[i]); 
        } else {
            for (int i=(cand.size()+1)/2; i<cand.size(); i++) nw.push_back(cand[i]);
        }
        cand=nw;
    }
    answer(ans,cand[0]);
}

Compilation message

highway.cpp: In function 'void find_pair(int, std::vector<int>, std::vector<int>, int, int)':
highway.cpp:48:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |         for (int i=0; i<(cand.size()+1)/2; i++) tp[pa[cand[i]]]=1;
      |                       ~^~~~~~~~~~~~~~~~~~
highway.cpp:52:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |             for (int i=0; i<(cand.size()+1)/2; i++) nw.push_back(cand[i]);
      |                           ~^~~~~~~~~~~~~~~~~~
highway.cpp:54:44: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |             for (int i=(cand.size()+1)/2; i<cand.size(); i++) nw.push_back(cand[i]);
      |                                           ~^~~~~~~~~~~~
highway.cpp:72:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   72 |         for (int i=0; i<(cand.size()+1)/2; i++) tp[pa[cand[i]]]=1;
      |                       ~^~~~~~~~~~~~~~~~~~
highway.cpp:76:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   76 |             for (int i=0; i<(cand.size()+1)/2; i++) nw.push_back(cand[i]);
      |                           ~^~~~~~~~~~~~~~~~~~
highway.cpp:78:44: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   78 |             for (int i=(cand.size()+1)/2; i<cand.size(); i++) nw.push_back(cand[i]);
      |                                           ~^~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3408 KB Output is correct
2 Correct 1 ms 3400 KB Output is correct
3 Correct 1 ms 3396 KB Output is correct
4 Correct 1 ms 3400 KB Output is correct
5 Correct 1 ms 3400 KB Output is correct
6 Correct 1 ms 3396 KB Output is correct
7 Correct 1 ms 3400 KB Output is correct
8 Correct 1 ms 3404 KB Output is correct
9 Correct 1 ms 3404 KB Output is correct
10 Correct 1 ms 3400 KB Output is correct
11 Correct 2 ms 3848 KB Output is correct
12 Correct 1 ms 3404 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3416 KB Output is correct
2 Correct 8 ms 4112 KB Output is correct
3 Correct 73 ms 9556 KB Output is correct
4 Correct 93 ms 10060 KB Output is correct
5 Correct 94 ms 9904 KB Output is correct
6 Correct 94 ms 9924 KB Output is correct
7 Correct 80 ms 9924 KB Output is correct
8 Correct 107 ms 9904 KB Output is correct
9 Correct 89 ms 9560 KB Output is correct
10 Correct 123 ms 9928 KB Output is correct
11 Correct 75 ms 10056 KB Output is correct
12 Correct 76 ms 10748 KB Output is correct
13 Correct 77 ms 10732 KB Output is correct
14 Correct 88 ms 10452 KB Output is correct

Subtask #3
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 4824 KB Output is correct
2 Correct 21 ms 5716 KB Output is correct
3 Correct 23 ms 7164 KB Output is correct
4 Correct 67 ms 12568 KB Output is correct
5 Correct 77 ms 12504 KB Output is correct
6 Correct 62 ms 14016 KB Output is correct
7 Correct 79 ms 14672 KB Output is correct
8 Correct 72 ms 12964 KB Output is correct
9 Correct 77 ms 13104 KB Output is correct

Subtask #4
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 3424 KB Output is correct
2 Correct 16 ms 4304 KB Output is correct
3 Correct 80 ms 8600 KB Output is correct
4 Correct 96 ms 9908 KB Output is correct
5 Correct 60 ms 9556 KB Output is correct
6 Correct 80 ms 10120 KB Output is correct
7 Correct 92 ms 9576 KB Output is correct
8 Correct 81 ms 9632 KB Output is correct
9 Correct 113 ms 9772 KB Output is correct
10 Correct 84 ms 9544 KB Output is correct
11 Correct 101 ms 10376 KB Output is correct
12 Correct 76 ms 11144 KB Output is correct
13 Correct 68 ms 10520 KB Output is correct
14 Correct 80 ms 10452 KB Output is correct
15 Correct 96 ms 9908 KB Output is correct
16 Correct 82 ms 9936 KB Output is correct
17 Correct 98 ms 10232 KB Output is correct
18 Correct 82 ms 10620 KB Output is correct
19 Correct 90 ms 9560 KB Output is correct
20 Correct 73 ms 11440 KB Output is correct
21 Correct 75 ms 10664 KB Output is correct
22 Correct 81 ms 10684 KB Output is correct
23 Correct 102 ms 10344 KB Output is correct
24 Correct 87 ms 10364 KB Output is correct
25 Correct 93 ms 13860 KB Output is correct

Subtask #5
0 / 18.0

# Verdict Execution time Memory Grader output
1 Runtime error 238 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 199 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -