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Submission #847600

# Submission time Handle Problem Language Result Execution time Memory
847600 2023-09-10T03:49:16 Z ibm2006 Longest Trip (IOI23_longesttrip) C++17
100 / 100
 13 ms 856 KB 
#include "longesttrip.h"
#include<bits/stdc++.h>
using namespace std;
typedef int ll;
ll n,i,j,k,s,t,x,y,z,w;
deque<ll> dq1,dq2;
vector<ll>v;
pair<ll,ll> p;
pair<ll,ll> inv(pair<ll,ll> p)
{
    return {p.second,p.first};
}
pair<ll,ll> adj(vector<ll> a,vector<ll> b)
{
    ll k=0;
    if(a.size()<b.size())
        {swap(a,b);  k=1;}
    if(a.size()==1&&b.size()==1)
    return {a[0],b[0]};
    vector<ll>c;
    for(i=0;i<a.size()/2;i++)
        c.push_back(a[i]);
    if(are_connected(c,b))
    {
        if(k==1)
        {
            return inv(adj(c,b));
        }
        else
            return adj(c,b);
    }
    else
    {
        c.clear();
        for(i=a.size()/2;i<a.size();i++)
            c.push_back(a[i]);
        if(k==1)
        {
            return inv(adj(c,b));
        }
        else
            return adj(c,b);
    }
}
vector<ll> vectorize(deque<ll> d)
{
    ll i;
    vector<ll> v;
    for(i=0;i<d.size();i++)
        v.push_back(d[i]);
    return v;
}
void combine()
{
    for(auto x:dq2)
        dq1.push_front(x);
    dq2.clear();
}
void answer()
{
    ll i;
    v.clear();
    for(i=0;i<dq1.size();i++)
    {
        v.push_back(dq1[i]);
    }
}
void init()
{
    dq1.clear();
    dq2.clear();
    v.clear();
    s=0;
    t=0;
}
vector<ll> longest_trip(ll N, ll D)
{
    init();
    n=N;
    dq1.push_back(0);
    dq2.push_back(1);
    for(i=2;i<n;i++)
    {
        if(i==n-1)
        {if(are_connected({dq1[0]},{dq2[0]}))
        {
        combine();
        dq2.push_back(i);
        continue;
        }
        if(are_connected({dq1[0]},{i}))
            {
                dq1.push_front(i);
                continue;
            }
            dq2.push_front(i);
        }
        else
        {
            if(are_connected({i},{i+1}))
                {
                    if(are_connected({dq1[0]},{dq2[0]}))
                    {
                    combine();
                     dq2.push_back(i);
                     dq2.push_back(i+1);
                     i++;
                    continue;
                    }
                    if(are_connected({dq1[0]},{i}))
            {
                dq1.push_front(i);
                dq1.push_front(i+1);
                i++;
                continue;
            }
            dq2.push_front(i);
            dq2.push_front(i+1);
                }
                else
                {
                    if(are_connected({dq1[0]},{i}))
                    {
                         dq1.push_front(i);
                         if(are_connected({dq2[0]},{i}))
                        {
                        combine();
                        dq2.push_back(i+1);
                        }
                        else
                        {
                            dq2.push_front(i+1);
                        }
                    }
                    else
                    {
                        dq1.push_front(i+1);
                        if(are_connected({dq2[0]},{i+1}))
                        {
                        combine();
                        dq2.push_back(i);
                        }
                        else
                        {
                            dq2.push_front(i);
                        }
                    }
                }
                i++;
        }
    }
    if(dq1.size()<dq2.size())
        swap(dq1,dq2);
        if(!are_connected(vectorize(dq1),vectorize(dq2)))
        {
            answer();
            return v;
        }
        /*for(ll x:dq1)
            printf("%d ",x);
        printf("\n");
        for(ll x:dq2)
            printf("%d ",x);
        printf("\n");*/
    if(dq2.size()==1)
    {
        if(are_connected({dq1[0]},{dq2[0]}))
        {
            dq1.push_front(dq2[0]);
        }
        else if(are_connected({dq1[dq1.size()-1]},{dq2[0]}))
            {
                dq1.push_back(dq2[0]);
            }
            else
            {
                for(i=0;i<dq1.size();i++)
                {
                    v.push_back(dq1[i]);
                }
                x=adj(vectorize(dq1),vectorize(dq2)).first;
                v.clear();
                v.push_back(dq2[0]);
                for(i=0;i<dq1.size();i++)
                {
                    if(dq1[i]==x)
                    {
                        t=1;
                    }
                    if(t==1)
                        v.push_back(dq1[i]);
                }
                for(i=0;i<dq1.size();i++)
                {
                    if(dq1[i]==x)
                        t=0;
                    if(t==1)
                        v.push_back(dq1[i]);
                }
                return v;
            }
        answer();
        return v;
    }
    if(are_connected({dq1[0]},{dq2[0],dq2.back()}))
        {
            if(are_connected({dq1[0]},{dq2[0]}))
            {
            for(auto x:dq2)
                dq1.push_front(x);
            answer();
            return v;
        }
        else
            {
                for(i=dq2.size()-1;i>=0;i--)
                {
                    dq1.push_front(dq2[i]);
                }
                answer();
               return v;
            }
        }
    else if(are_connected({dq1[dq1.size()-1]},{dq2[0],dq2.back()}))
        {
            if(are_connected({dq1[dq1.size()-1]},{dq2[0]}))
            {
            for(auto x:dq2)
                dq1.push_back(x);
            answer();
            return v;
        }
        else
        {
            for(i=dq2.size()-1;i>=0;i--)
                {
                    dq1.push_back(dq2[i]);
                }
                answer();
               return v;
        }
        }
    else
    {
        p=adj(vectorize(dq1),vectorize(dq2));
        x=p.first;
        y=p.second;
        //printf("%d %d\n",x,y);
        t=0;
        for(i=0;i<dq1.size();i++)
        {
            if(t==1)
            {
                v.push_back(dq1[i]);
            }
            if(dq1[i]==x)
                t=1;
        }
        for(i=0;i<dq1.size();i++)
        {
            if(t==1)
                v.push_back(dq1[i]);
            if(dq1[i]==x)
                t=0;
        }
        for(i=0;i<dq2.size();i++)
        {
            if(dq2[i]==y)
                t=1;
            if(t==1)
            {
                v.push_back(dq2[i]);
            }
        }
        for(i=0;i<dq2.size();i++)
        {
            if(dq2[i]==y)
                t=0;
                if(t==1)
                    v.push_back(dq2[i]);
        }
        return v;
    }
}

Compilation message

longesttrip.cpp: In function 'std::pair<int, int> adj(std::vector<int>, std::vector<int>)':
longesttrip.cpp:21:14: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |     for(i=0;i<a.size()/2;i++)
      |             ~^~~~~~~~~~~
longesttrip.cpp:35:27: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |         for(i=a.size()/2;i<a.size();i++)
      |                          ~^~~~~~~~~
longesttrip.cpp: In function 'std::vector<int> vectorize(std::deque<int>)':
longesttrip.cpp:49:14: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |     for(i=0;i<d.size();i++)
      |             ~^~~~~~~~~
longesttrip.cpp: In function 'void answer()':
longesttrip.cpp:63:14: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |     for(i=0;i<dq1.size();i++)
      |             ~^~~~~~~~~~~
longesttrip.cpp: In function 'std::vector<int> longest_trip(ll, ll)':
longesttrip.cpp:152:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  152 |     if(dq1.size()<dq2.size())
      |     ^~
longesttrip.cpp:154:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
  154 |         if(!are_connected(vectorize(dq1),vectorize(dq2)))
      |         ^~
longesttrip.cpp:177:26: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  177 |                 for(i=0;i<dq1.size();i++)
      |                         ~^~~~~~~~~~~
longesttrip.cpp:184:26: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  184 |                 for(i=0;i<dq1.size();i++)
      |                         ~^~~~~~~~~~~
longesttrip.cpp:193:26: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  193 |                 for(i=0;i<dq1.size();i++)
      |                         ~^~~~~~~~~~~
longesttrip.cpp:250:18: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  250 |         for(i=0;i<dq1.size();i++)
      |                 ~^~~~~~~~~~~
longesttrip.cpp:259:18: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  259 |         for(i=0;i<dq1.size();i++)
      |                 ~^~~~~~~~~~~
longesttrip.cpp:266:18: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  266 |         for(i=0;i<dq2.size();i++)
      |                 ~^~~~~~~~~~~
longesttrip.cpp:275:18: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  275 |         for(i=0;i<dq2.size();i++)
      |                 ~^~~~~~~~~~~
longesttrip.cpp:277:13: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  277 |             if(dq2[i]==y)
      |             ^~
longesttrip.cpp:279:17: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
  279 |                 if(t==1)
      |                 ^~

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 2 ms 540 KB Output is correct

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 344 KB Output is correct
2 Correct 6 ms 512 KB Output is correct
3 Correct 4 ms 344 KB Output is correct
4 Correct 5 ms 344 KB Output is correct
5 Correct 5 ms 344 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 344 KB Output is correct
2 Correct 5 ms 344 KB Output is correct
3 Correct 4 ms 344 KB Output is correct
4 Correct 5 ms 344 KB Output is correct
5 Correct 6 ms 600 KB Output is correct
6 Correct 7 ms 344 KB Output is correct
7 Correct 7 ms 344 KB Output is correct
8 Correct 7 ms 344 KB Output is correct
9 Correct 4 ms 344 KB Output is correct
10 Correct 5 ms 600 KB Output is correct
11 Correct 5 ms 600 KB Output is correct
12 Correct 4 ms 344 KB Output is correct
13 Correct 5 ms 344 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 344 KB Output is correct
2 Correct 5 ms 344 KB Output is correct
3 Correct 5 ms 344 KB Output is correct
4 Correct 4 ms 344 KB Output is correct
5 Correct 7 ms 344 KB Output is correct
6 Correct 9 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 4 ms 344 KB Output is correct
10 Correct 4 ms 600 KB Output is correct
11 Correct 4 ms 600 KB Output is correct
12 Correct 4 ms 344 KB Output is correct
13 Correct 5 ms 344 KB Output is correct
14 Correct 8 ms 512 KB Output is correct
15 Correct 6 ms 344 KB Output is correct
16 Correct 8 ms 344 KB Output is correct
17 Correct 6 ms 344 KB Output is correct
18 Correct 5 ms 344 KB Output is correct
19 Correct 6 ms 344 KB Output is correct
20 Correct 5 ms 344 KB Output is correct
21 Correct 5 ms 344 KB Output is correct
22 Correct 5 ms 600 KB Output is correct
23 Correct 5 ms 344 KB Output is correct
24 Correct 6 ms 600 KB Output is correct
25 Correct 6 ms 344 KB Output is correct
26 Correct 6 ms 344 KB Output is correct
27 Correct 6 ms 344 KB Output is correct
28 Correct 8 ms 344 KB Output is correct
29 Correct 6 ms 596 KB Output is correct
30 Correct 5 ms 440 KB Output is correct
31 Correct 7 ms 444 KB Output is correct
32 Correct 6 ms 444 KB Output is correct
33 Correct 6 ms 344 KB Output is correct
34 Correct 5 ms 344 KB Output is correct
35 Correct 7 ms 344 KB Output is correct
36 Correct 6 ms 344 KB Output is correct
37 Correct 6 ms 344 KB Output is correct
38 Correct 6 ms 600 KB Output is correct
39 Correct 6 ms 600 KB Output is correct
40 Correct 6 ms 600 KB Output is correct
41 Correct 9 ms 600 KB Output is correct
42 Correct 7 ms 600 KB Output is correct
43 Correct 7 ms 600 KB Output is correct
44 Correct 6 ms 600 KB Output is correct
45 Correct 9 ms 344 KB Output is correct
46 Correct 9 ms 344 KB Output is correct
47 Correct 7 ms 344 KB Output is correct
48 Correct 7 ms 344 KB Output is correct
49 Correct 7 ms 596 KB Output is correct
50 Correct 6 ms 440 KB Output is correct
51 Correct 8 ms 440 KB Output is correct
52 Correct 7 ms 440 KB Output is correct
53 Correct 6 ms 600 KB Output is correct
54 Correct 6 ms 344 KB Output is correct
55 Correct 6 ms 600 KB Output is correct
56 Correct 6 ms 344 KB Output is correct
57 Correct 6 ms 600 KB Output is correct
58 Correct 7 ms 604 KB Output is correct
59 Correct 7 ms 604 KB Output is correct
60 Correct 6 ms 604 KB Output is correct
61 Correct 8 ms 604 KB Output is correct
62 Correct 7 ms 448 KB Output is correct
63 Correct 7 ms 604 KB Output is correct
64 Correct 6 ms 604 KB Output is correct

Subtask #4
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 344 KB Output is correct
2 Correct 6 ms 344 KB Output is correct
3 Correct 5 ms 600 KB Output is correct
4 Correct 4 ms 344 KB Output is correct
5 Correct 4 ms 344 KB Output is correct
6 Correct 8 ms 344 KB Output is correct
7 Correct 5 ms 344 KB Output is correct
8 Correct 5 ms 344 KB Output is correct
9 Correct 5 ms 600 KB Output is correct
10 Correct 4 ms 344 KB Output is correct
11 Correct 4 ms 600 KB Output is correct
12 Correct 4 ms 600 KB Output is correct
13 Correct 4 ms 344 KB Output is correct
14 Correct 7 ms 344 KB Output is correct
15 Correct 11 ms 344 KB Output is correct
16 Correct 6 ms 344 KB Output is correct
17 Correct 5 ms 344 KB Output is correct
18 Correct 5 ms 344 KB Output is correct
19 Correct 5 ms 344 KB Output is correct
20 Correct 5 ms 344 KB Output is correct
21 Correct 7 ms 596 KB Output is correct
22 Correct 6 ms 344 KB Output is correct
23 Correct 8 ms 344 KB Output is correct
24 Correct 9 ms 344 KB Output is correct
25 Correct 7 ms 600 KB Output is correct
26 Correct 6 ms 436 KB Output is correct
27 Correct 6 ms 440 KB Output is correct
28 Correct 6 ms 440 KB Output is correct
29 Correct 6 ms 344 KB Output is correct
30 Correct 6 ms 344 KB Output is correct
31 Correct 6 ms 344 KB Output is correct
32 Correct 11 ms 344 KB Output is correct
33 Correct 13 ms 344 KB Output is correct
34 Correct 8 ms 344 KB Output is correct
35 Correct 7 ms 344 KB Output is correct
36 Correct 7 ms 344 KB Output is correct
37 Correct 6 ms 436 KB Output is correct
38 Correct 7 ms 440 KB Output is correct
39 Correct 7 ms 440 KB Output is correct
40 Correct 6 ms 600 KB Output is correct
41 Correct 7 ms 344 KB Output is correct
42 Correct 6 ms 600 KB Output is correct
43 Correct 6 ms 600 KB Output is correct
44 Correct 6 ms 600 KB Output is correct
45 Correct 5 ms 344 KB Output is correct
46 Correct 5 ms 600 KB Output is correct
47 Correct 6 ms 600 KB Output is correct
48 Correct 6 ms 600 KB Output is correct
49 Correct 7 ms 600 KB Output is correct
50 Correct 6 ms 600 KB Output is correct
51 Correct 8 ms 600 KB Output is correct
52 Correct 6 ms 600 KB Output is correct
53 Correct 8 ms 600 KB Output is correct
54 Correct 6 ms 600 KB Output is correct
55 Correct 6 ms 852 KB Output is correct
56 Correct 6 ms 600 KB Output is correct
57 Correct 9 ms 600 KB Output is correct
58 Correct 6 ms 440 KB Output is correct
59 Correct 6 ms 600 KB Output is correct
60 Correct 7 ms 600 KB Output is correct
61 Correct 6 ms 600 KB Output is correct
62 Correct 5 ms 344 KB Output is correct
63 Correct 8 ms 600 KB Output is correct
64 Correct 7 ms 604 KB Output is correct
65 Correct 7 ms 452 KB Output is correct
66 Correct 7 ms 444 KB Output is correct
67 Correct 7 ms 604 KB Output is correct
68 Correct 10 ms 604 KB Output is correct
69 Correct 7 ms 444 KB Output is correct
70 Correct 7 ms 604 KB Output is correct
71 Correct 6 ms 600 KB Output is correct
72 Correct 7 ms 604 KB Output is correct
73 Correct 7 ms 604 KB Output is correct
74 Correct 8 ms 800 KB Output is correct
75 Correct 8 ms 604 KB Output is correct
76 Correct 8 ms 448 KB Output is correct
77 Correct 6 ms 600 KB Output is correct
78 Correct 7 ms 604 KB Output is correct
79 Correct 8 ms 604 KB Output is correct
80 Correct 7 ms 604 KB Output is correct
81 Correct 7 ms 604 KB Output is correct
82 Correct 9 ms 856 KB Output is correct