oj.uz

Submission #1073369

# Submission time Handle Problem Language Result Execution time Memory
1073369 2024-08-24T13:37:42 Z Unforgettablepl Longest Trip (IOI23_longesttrip) C++17
60 / 100
 936 ms 1556 KB 
#pragma GCC optimize("Ofast","unroll-all-loops")
#include "longesttrip.h"
#include <bits/stdc++.h>
using namespace std;

vector<int> longest_trip(int N,int D){
    vector<vector<int>> adj(N);
    vector areConnected(N,vector<bool>(N));
    for(int i=0;i<N;i++) {
        for(int j=i+1;j<N;j++) {
            if(are_connected({i},{j})) {
                adj[i].emplace_back(j);
                adj[j].emplace_back(i);
                areConnected[i][j]=areConnected[j][i]=true;
            }
        }
    }
    {
        // Case 1 if two components
        int isTwo = -1;
        {
            vector<bool> visited(N);
            int curr = 0;
            function<void(int)> dfs = [&](int x) {
                if(visited[x])return;
                visited[x]=true;
                curr++;
                for(int&i:adj[x])dfs(i);
            };
            dfs(0);
            if(curr!=N) {
                if(curr>=N-curr)isTwo=0;
                else {
                    for(int i=0;i<N;i++) {
                        if(!visited[i]){
                            isTwo=i;break;
                        }
                    }
                }
            }
        }
        if(isTwo!=-1) {
            vector<bool> visited(N);
            vector<int> ans;
            function<void(int)> dfs = [&](int x) {
                visited[x]=true;
                ans.emplace_back(x);
                for(int&i:adj[x])if(!visited[i]) {
                    dfs(i);
                    return;
                }
            };
            dfs(isTwo);
            return ans;
        }
    }
    vector<vector<int>> path(3);
    vector<bool> visited(N);
    function<int(int,int)> dfs = [&](int x,int def) {
        visited[x]=true;
        int state = def;
        int children = 0;
        for(int&i:adj[x])if(!visited[i]) {
            children++;
            if(children==2) {
                assert(dfs(i,2)==2);
                state=0;
                break;
            }
            auto ans = dfs(i,def);
            if(ans==0) {
                state = 0;
                break;
            }
        }
        path[state].emplace_back(x);
        return state;
    };
    auto curr = dfs(0,1);
    if(curr==1) {
        return path[1];
    }
    assert(curr==0);
    if(path[0].size()==1) {
        vector<int> ans = path[1];
        ans.emplace_back(path[0][0]);
        reverse(path[2].begin(),path[2].end());
        for(int&i:path[2])ans.emplace_back(i);
        return ans;
    }
    if(!areConnected[path[0][1]][path[1][0]])swap(path[1],path[2]);
    assert(areConnected[path[0][1]][path[1][0]]);
    path[1].emplace_back(path[0][0]);
    path[0].erase(path[0].begin());
    reverse(path[0].begin(),path[0].end());
    reverse(path[2].begin(),path[2].end());
    auto ans = path[0];
    for(int&i:path[1])ans.emplace_back(i);
    for(int&i:path[2])ans.emplace_back(i);
    assert(ans.size()==N);
    return ans;
}

Compilation message

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:3:
longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:100:22: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  100 |     assert(ans.size()==N);
      |            ~~~~~~~~~~^~~

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 184 ms 924 KB Output is correct

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 344 KB Output is correct
2 Correct 17 ms 344 KB Output is correct
3 Correct 150 ms 436 KB Output is correct
4 Correct 424 ms 964 KB Output is correct
5 Correct 894 ms 1224 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 344 KB Output is correct
2 Correct 29 ms 344 KB Output is correct
3 Correct 147 ms 444 KB Output is correct
4 Correct 433 ms 732 KB Output is correct
5 Correct 844 ms 1020 KB Output is correct
6 Correct 6 ms 344 KB Output is correct
7 Correct 27 ms 600 KB Output is correct
8 Correct 159 ms 456 KB Output is correct
9 Correct 346 ms 716 KB Output is correct
10 Correct 874 ms 1072 KB Output is correct
11 Correct 868 ms 1012 KB Output is correct
12 Correct 747 ms 1192 KB Output is correct
13 Correct 852 ms 864 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 23 ms 344 KB Output is correct
3 Correct 148 ms 460 KB Output is correct
4 Correct 411 ms 1008 KB Output is correct
5 Correct 831 ms 1196 KB Output is correct
6 Correct 10 ms 344 KB Output is correct
7 Correct 27 ms 600 KB Output is correct
8 Correct 148 ms 452 KB Output is correct
9 Correct 354 ms 1104 KB Output is correct
10 Correct 770 ms 1256 KB Output is correct
11 Correct 862 ms 828 KB Output is correct
12 Correct 832 ms 948 KB Output is correct
13 Correct 797 ms 1120 KB Output is correct
14 Correct 5 ms 344 KB Output is correct
15 Correct 12 ms 344 KB Output is correct
16 Correct 44 ms 344 KB Output is correct
17 Correct 78 ms 592 KB Output is correct
18 Correct 136 ms 600 KB Output is correct
19 Correct 319 ms 708 KB Output is correct
20 Correct 239 ms 708 KB Output is correct
21 Correct 780 ms 1028 KB Output is correct
22 Correct 837 ms 1228 KB Output is correct
23 Correct 863 ms 904 KB Output is correct
24 Correct 872 ms 932 KB Output is correct
25 Correct 12 ms 344 KB Output is correct
26 Correct 10 ms 344 KB Output is correct
27 Correct 27 ms 344 KB Output is correct
28 Correct 29 ms 384 KB Output is correct
29 Correct 21 ms 344 KB Output is correct
30 Correct 192 ms 344 KB Output is correct
31 Correct 186 ms 344 KB Output is correct
32 Correct 213 ms 344 KB Output is correct
33 Correct 318 ms 496 KB Output is correct
34 Correct 318 ms 724 KB Output is correct
35 Correct 320 ms 484 KB Output is correct
36 Correct 902 ms 1256 KB Output is correct
37 Correct 930 ms 1072 KB Output is correct
38 Correct 862 ms 944 KB Output is correct
39 Correct 873 ms 1072 KB Output is correct
40 Correct 863 ms 984 KB Output is correct
41 Correct 907 ms 1024 KB Output is correct
42 Correct 889 ms 1012 KB Output is correct
43 Correct 781 ms 1048 KB Output is correct
44 Correct 832 ms 1008 KB Output is correct
45 Correct 13 ms 344 KB Output is correct
46 Correct 10 ms 344 KB Output is correct
47 Correct 28 ms 344 KB Output is correct
48 Correct 24 ms 344 KB Output is correct
49 Correct 22 ms 344 KB Output is correct
50 Correct 196 ms 452 KB Output is correct
51 Correct 206 ms 704 KB Output is correct
52 Correct 211 ms 448 KB Output is correct
53 Correct 323 ms 504 KB Output is correct
54 Correct 294 ms 752 KB Output is correct
55 Correct 320 ms 848 KB Output is correct
56 Correct 854 ms 928 KB Output is correct
57 Correct 819 ms 896 KB Output is correct
58 Correct 866 ms 992 KB Output is correct
59 Correct 850 ms 928 KB Output is correct
60 Correct 826 ms 1104 KB Output is correct
61 Correct 824 ms 840 KB Output is correct
62 Correct 855 ms 996 KB Output is correct
63 Correct 931 ms 868 KB Output is correct
64 Correct 854 ms 1360 KB Output is correct

Subtask #4
19.999999998 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 344 KB Output is correct
2 Correct 23 ms 344 KB Output is correct
3 Partially correct 138 ms 448 KB Output is partially correct
4 Partially correct 425 ms 344 KB Output is partially correct
5 Partially correct 865 ms 1140 KB Output is partially correct
6 Correct 6 ms 344 KB Output is correct
7 Correct 22 ms 440 KB Output is correct
8 Partially correct 170 ms 440 KB Output is partially correct
9 Partially correct 348 ms 488 KB Output is partially correct
10 Partially correct 854 ms 980 KB Output is partially correct
11 Partially correct 852 ms 1324 KB Output is partially correct
12 Partially correct 832 ms 1132 KB Output is partially correct
13 Partially correct 900 ms 1140 KB Output is partially correct
14 Correct 5 ms 596 KB Output is correct
15 Correct 11 ms 344 KB Output is correct
16 Correct 56 ms 344 KB Output is correct
17 Partially correct 96 ms 424 KB Output is partially correct
18 Partially correct 199 ms 692 KB Output is partially correct
19 Partially correct 314 ms 720 KB Output is partially correct
20 Partially correct 293 ms 512 KB Output is partially correct
21 Correct 9 ms 344 KB Output is correct
22 Correct 9 ms 344 KB Output is correct
23 Correct 22 ms 344 KB Output is correct
24 Correct 26 ms 344 KB Output is correct
25 Correct 34 ms 344 KB Output is correct
26 Partially correct 180 ms 708 KB Output is partially correct
27 Partially correct 227 ms 600 KB Output is partially correct
28 Partially correct 214 ms 344 KB Output is partially correct
29 Partially correct 353 ms 600 KB Output is partially correct
30 Partially correct 310 ms 480 KB Output is partially correct
31 Partially correct 324 ms 480 KB Output is partially correct
32 Correct 9 ms 344 KB Output is correct
33 Correct 9 ms 344 KB Output is correct
34 Correct 23 ms 344 KB Output is correct
35 Correct 33 ms 344 KB Output is correct
36 Correct 20 ms 344 KB Output is correct
37 Partially correct 218 ms 600 KB Output is partially correct
38 Partially correct 188 ms 600 KB Output is partially correct
39 Partially correct 212 ms 592 KB Output is partially correct
40 Partially correct 338 ms 592 KB Output is partially correct
41 Partially correct 325 ms 708 KB Output is partially correct
42 Partially correct 348 ms 960 KB Output is partially correct
43 Partially correct 827 ms 896 KB Output is partially correct
44 Partially correct 850 ms 1016 KB Output is partially correct
45 Partially correct 844 ms 1316 KB Output is partially correct
46 Partially correct 840 ms 928 KB Output is partially correct
47 Partially correct 839 ms 1260 KB Output is partially correct
48 Partially correct 843 ms 1508 KB Output is partially correct
49 Partially correct 875 ms 1220 KB Output is partially correct
50 Partially correct 804 ms 1392 KB Output is partially correct
51 Partially correct 850 ms 1132 KB Output is partially correct
52 Partially correct 857 ms 1104 KB Output is partially correct
53 Partially correct 866 ms 1056 KB Output is partially correct
54 Partially correct 872 ms 968 KB Output is partially correct
55 Partially correct 880 ms 1064 KB Output is partially correct
56 Partially correct 912 ms 788 KB Output is partially correct
57 Partially correct 888 ms 808 KB Output is partially correct
58 Partially correct 901 ms 936 KB Output is partially correct
59 Partially correct 849 ms 1132 KB Output is partially correct
60 Partially correct 836 ms 768 KB Output is partially correct
61 Partially correct 886 ms 728 KB Output is partially correct
62 Partially correct 852 ms 1072 KB Output is partially correct
63 Partially correct 872 ms 1360 KB Output is partially correct
64 Partially correct 845 ms 1328 KB Output is partially correct
65 Partially correct 867 ms 968 KB Output is partially correct
66 Partially correct 902 ms 1068 KB Output is partially correct
67 Partially correct 936 ms 1024 KB Output is partially correct
68 Partially correct 855 ms 1264 KB Output is partially correct
69 Partially correct 868 ms 1024 KB Output is partially correct
70 Partially correct 906 ms 932 KB Output is partially correct
71 Partially correct 869 ms 1556 KB Output is partially correct
72 Partially correct 858 ms 984 KB Output is partially correct
73 Partially correct 859 ms 1316 KB Output is partially correct
74 Partially correct 921 ms 1140 KB Output is partially correct
75 Partially correct 874 ms 1236 KB Output is partially correct
76 Partially correct 862 ms 1296 KB Output is partially correct
77 Partially correct 904 ms 996 KB Output is partially correct
78 Partially correct 870 ms 968 KB Output is partially correct
79 Partially correct 907 ms 1320 KB Output is partially correct
80 Partially correct 870 ms 1020 KB Output is partially correct
81 Partially correct 852 ms 768 KB Output is partially correct
82 Partially correct 881 ms 800 KB Output is partially correct