oj.uz

Submission #962881

# Submission time Handle Problem Language Result Execution time Memory
962881 2024-04-14T09:17:43 Z Warinchai Longest Trip (IOI23_longesttrip) C++17
15 / 100
 48 ms 700 KB 
#include "longesttrip.h"
#include<bits/stdc++.h>
using namespace std;
vector<int>longest_trip_3(int N){
    vector<int>ans;
    for(int i=0;i<N;i++)ans.push_back(i);
    return ans;
}
vector<int>longest_trip_2(int N){
    vector<int>ans;
    vector<int>tans;
    tans.push_back(0);
    for(int i=1;i<N;i++){
        if(are_connected({i-1},{i}))tans.push_back(i);
        else if(i!=N-1)tans.push_back(i+1),tans.push_back(i),i++;
        else ans.push_back(i);
    }
    for(auto x:tans)ans.push_back(x);
    return ans;
}
int vis[256];
int fnext(int x,int sz){
    if(sz==0)return -1;
    //cerr<<"fnext:"<<x<<" "<<sz<<"\n";
    int st=1,en=sz,ans=0;
    int id=-1;
    vector<int>ask;
    while(st<=en){
        int m=(st+en)/2;
        ask.clear();
        int cur=0;
        while(ask.size()<m){
            if(!vis[cur])ask.push_back(cur);
            cur++;
        }
        //cerr<<m<<" ask:";
        //for(auto x:ask)cerr<<x<<" ";
        //cerr<<"\n";
        if(are_connected({x},ask)){
            en=m-1;
            ans=m;
            id=cur-1;
        }else{
            st=m+1;
        }
    }
    return id;
}
pair<int,int> fconnection(vector<int>comp1,vector<int>comp2){
    int sz=comp1.size();
    //cerr<<"fnext:"<<x<<" "<<sz<<"\n";
    int st=0,en=sz-1;
    int ans1=-1,ans2=-1;
    int id1=-1;
    vector<int>ask;
    while(st<=en){
        int m=(st+en)/2;
        ask.clear();
        for(int i=0;i<=m;i++)ask.push_back(comp1[i]);
        if(are_connected(ask,comp2)){
            en=m-1;
            ans1=comp1[m];
            id1=m;
        }else{
            st=m+1;
        }
    }
    vector<int>temp;
    for(int i=0;i<=id1;i++)temp.push_back(comp1[i]);
    st=0,en=comp2.size()-1;
    while(st<=en){
        int m=(st+en)/2;
        ask.clear();
        for(int i=0;i<=m;i++)ask.push_back(comp2[i]);
        if(are_connected(ask,temp)){
            en=m-1;
            ans2=comp2[m];
        }else{
            st=m+1;
        }
    }
    return {ans1,ans2};
}
pair<int,int> fincom(int x,vector<int>ans){
    int sz=ans.size();
    //cerr<<"fnext:"<<x<<" "<<sz<<"\n";
    int st=0,en=sz-1;
    int id=-1,pos=-1;
    vector<int>ask;
    while(st<=en){
        int m=(st+en)/2;
        ask.clear();
        for(int i=0;i<=m;i++)ask.push_back(ans[i]);
        if(are_connected({x},ask)){
            en=m-1;
            id=ans[m];
            pos=m;
        }else{
            st=m+1;
        }
    }
    return {id,pos};
}
int vis2[256];
vector<int>longest_trip_1(int N){
    for(int i=0;i<256;i++)vis[i]=0,vis2[i]=0;
    vector<int>ans;
    vector<int>rans;
    vector<int>ians;
    ans.push_back(0);
    vis[0]=1;
    int cur=0,left=N-1;
    while(1){
        //cerr<<cur<<"\n";
        int x=fnext(cur,left);
        if(x!=-1){
            cur=x;
            left--;
            ans.push_back(cur);
            vis[cur]++;
        }else{
            break;
        }
    }
    for(int i=0;i<N;i++)if(!vis[i])ians.push_back(i);
    if(ans.size()==N){
        //assert(0);
        return ans;
    }
    bool check=are_connected(ans,ians);
    if(!check){
        assert(0);
        return ans.size()>ians.size()?ans:ians;
    }
    int outcom=ians[0];
    auto x=fincom(outcom,ans);
    for(int i=ians.size()-1;i>=0;i--)rans.push_back(ians[i]);
    assert(rans.size()==ians.size());
    //assert(x.second>=0);
    for(int i=x.second;i<ans.size();i++)rans.push_back(ans[i]);
    for(int i=0;i<x.second;i++)rans.push_back(ans[i]);
    for(int i=1;i<rans.size();i++)assert(are_connected({rans[i]},{rans[i-1]}));
    assert(ians.size()+ans.size()==N);
    //assert(rans.size()==N);
    return rans;
    /*
    vector<int>comp1,comp2;
    /*for(int i=0;i<N;i++){
        if(vis[i]||i==outcom)continue;
        if(!(are_connected({i},{outcom})))comp1.push_back(i);
        /*if(i==outcom)comp2.push_back(i);
        else if((are_connected({i},{outcom})))comp2.push_back(i);
        else comp1.push_back(i);
    }
    auto connection=fconnection(comp1,comp2);
    for(auto x:comp1)if(x!=connection.first)rans.push_back(x);
    rans.push_back(connection.first);
    rans.push_back(connection.second);
    for(auto x:comp2)if(x!=connection.second)rans.push_back(x);
    for(int i=1;i<comp1.size();i++)assert(are_connected({comp1[i]},{comp1[i-1]}));
    //for(int i=1;i<comp2.size();i++)assert(are_connected({comp2[i]},{comp2[i-1]}));
    return rans;*/
}
vector<int> longest_trip(int N, int D)
{
    if(D==1)return longest_trip_1(N);
    else if(D==2)return longest_trip_2(N);
    else return longest_trip_3(N);
    //cerr<<"end of query\n";
    return {};
}

Compilation message

longesttrip.cpp:148:5: warning: "/*" within comment [-Wcomment]
  148 |     /*for(int i=0;i<N;i++){
      |      
longesttrip.cpp:151:9: warning: "/*" within comment [-Wcomment]
  151 |         /*if(i==outcom)comp2.push_back(i);
      |          
longesttrip.cpp: In function 'int fnext(int, int)':
longesttrip.cpp:32:25: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   32 |         while(ask.size()<m){
      |               ~~~~~~~~~~^~
longesttrip.cpp:25:20: warning: variable 'ans' set but not used [-Wunused-but-set-variable]
   25 |     int st=1,en=sz,ans=0;
      |                    ^~~
longesttrip.cpp: In function 'std::vector<int> longest_trip_1(int)':
longesttrip.cpp:126:18: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  126 |     if(ans.size()==N){
      |        ~~~~~~~~~~^~~
longesttrip.cpp:140:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  140 |     for(int i=x.second;i<ans.size();i++)rans.push_back(ans[i]);
      |                        ~^~~~~~~~~~~
longesttrip.cpp:142:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  142 |     for(int i=1;i<rans.size();i++)assert(are_connected({rans[i]},{rans[i-1]}));
      |                 ~^~~~~~~~~~~~
In file included from /usr/include/c++/10/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
                 from longesttrip.cpp:2:
longesttrip.cpp:143:34: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  143 |     assert(ians.size()+ans.size()==N);
      |            ~~~~~~~~~~~~~~~~~~~~~~^~~

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 600 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 344 KB Output is correct
2 Correct 1 ms 388 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 1 ms 600 KB Output is correct

Subtask #2
10.0 / 10.0

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

Subtask #3
0.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 344 KB Output is correct
2 Correct 11 ms 344 KB Output is correct
3 Correct 21 ms 344 KB Output is correct
4 Correct 30 ms 344 KB Output is correct
5 Correct 44 ms 696 KB Output is correct
6 Correct 9 ms 344 KB Output is correct
7 Correct 12 ms 344 KB Output is correct
8 Correct 23 ms 344 KB Output is correct
9 Correct 32 ms 596 KB Output is correct
10 Correct 43 ms 700 KB Output is correct
11 Correct 45 ms 448 KB Output is correct
12 Correct 44 ms 444 KB Output is correct
13 Correct 46 ms 440 KB Output is correct
14 Runtime error 1 ms 600 KB Execution killed with signal 6
15 Halted 0 ms 0 KB -

Subtask #4
0.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 344 KB Output is correct
2 Correct 11 ms 344 KB Output is correct
3 Correct 23 ms 344 KB Output is correct
4 Partially correct 34 ms 344 KB Output is partially correct
5 Partially correct 39 ms 696 KB Output is partially correct
6 Correct 8 ms 344 KB Output is correct
7 Correct 10 ms 344 KB Output is correct
8 Correct 23 ms 344 KB Output is correct
9 Partially correct 32 ms 344 KB Output is partially correct
10 Partially correct 41 ms 444 KB Output is partially correct
11 Partially correct 42 ms 444 KB Output is partially correct
12 Partially correct 44 ms 448 KB Output is partially correct
13 Partially correct 48 ms 444 KB Output is partially correct
14 Runtime error 1 ms 600 KB Execution killed with signal 6
15 Halted 0 ms 0 KB -