oj.uz

답안 #843132

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
843132 2023-09-03T17:44:36 Z mickey080929 가장 긴 여행 (IOI23_longesttrip) C++17
100 / 100
 13 ms 1112 KB 
#include "longesttrip.h"
#include <bits/stdc++.h>

using namespace std;

int n;
vector<vector<int>> lines;
vector<int> chk;
vector<int> head;

bool ask(int u, int v) {
    if (u == v) return true;
    return are_connected({u}, {v});
}

int Get() {
    for (int i=0; i<n; i++) {
        if (!chk[i]) return i;
    }
    return -1;
}

int Get2() {
    for (int i=0; i<n; i++) {
        if (head[i]) return i;
    }
    return -1;
}

void make_groups() {
    chk[0] = 1;
    while (Get() != -1) {
        int a = Get();
        chk[a] = 1;
        int b = Get();
        if (b == -1) break;
        chk[b] = 1;
        if (ask(a, b)) {
            lines[a].push_back(b);
            head[b] = 0;
            continue;
        }
        if (ask(a, lines[0].back())) swap(a, b);
        lines[0].push_back(b);
        head[b] = 0;
        int c = Get();
        if (c == -1) break;
        chk[c] = 1;
        if (ask(b, c)) {
            lines[0].push_back(c);
            head[c] = 0;
            chk[a] = 0;
            continue;
        }
        lines[c].push_back(a);
        head[a] = 0;
        int d = Get();
        if (d == -1) break;
        chk[d] = 1;
        if (ask(b, d)) {
            lines[0].push_back(d);
            head[d] = 0;
            continue;
        }
        lines[c].push_back(d);
        head[d] = 0;
    }
}

vector<int> longest_trip(int N, int D) {
    n = N;
    lines.resize(n);
    for (int i=0; i<n; i++) {
        lines[i].clear();
        lines[i].push_back(i);
    }
    chk.resize(n);
    fill(chk.begin(), chk.end(), 0);
    head.resize(n);
    fill(head.begin(), head.end(), 1);
    make_groups();
    int l1 = 0;
    head[0] = 0;
    int l2 = Get2();
    if (l2 == -1) return lines[0];
    head[l2] = 0;
    while (Get2() != -1) {
        int a = Get2();
        head[a] = 0;
        if (ask(lines[l1].back(), a)) {
            for (auto &i : lines[a]) {
                lines[l1].push_back(i);
            }
            continue;
        }
        if (ask(lines[l2].back(), a)) {
            for (auto &i : lines[a]) {
                lines[l2].push_back(i);
            }
            continue;
        }
        reverse(lines[l2].begin(), lines[l2].end());
        for (auto &i : lines[l2]) {
            lines[l1].push_back(i);
        }
        l2 = a;
    }
    if (!are_connected(lines[l1], lines[l2])) {
        if (lines[l1].size() >= lines[l2].size()) return lines[l1];
        return lines[l2];
    }
    if (!ask(lines[l1][0], lines[l1].back())) {
        if (ask(lines[l1][0], lines[l2][0])) {
            reverse(lines[l1].begin(), lines[l1].end());
        }
        for (auto &i : lines[l2]) {
            lines[l1].push_back(i);
        }
        return lines[l1];
    }
    if (!ask(lines[l2][0], lines[l2].back())) {
        if (ask(lines[l1][0], lines[l2][0])) {
            reverse(lines[l2].begin(), lines[l2].end());
        }
        for (auto &i : lines[l1]) {
            lines[l2].push_back(i);
        }
        return lines[l2];
    }
    int lo = 0, hi = (int)lines[l1].size() - 1;
    while (lo < hi) {
        int mid = lo + hi >> 1;
        vector<int> t(lines[l1].begin(), lines[l1].begin() + mid + 1);
        if (are_connected(t, lines[l2])) {
            hi = mid;
        }
        else {
            lo = mid + 1;
        }
    }
    int s1 = lo;
    lo = 0; hi = (int)lines[l2].size() - 1;
    while (lo < hi) {
        int mid = lo + hi >> 1;
        vector<int> t(lines[l2].begin(), lines[l2].begin() + mid + 1);
        if (are_connected({lines[l1][s1]}, t)) {
            hi = mid;
        }
        else {
            lo = mid + 1;
        }
    }
    int s2 = lo;
    vector<int> ans;
    int sz = (int)lines[l1].size();
    for (int i=0; i<sz; i++) {
        ans.push_back(lines[l1][(s1+i+1)%sz]);
    }
    sz = (int)lines[l2].size();
    for (int i=0; i<sz; i++) {
        ans.push_back(lines[l2][(s2+i)%sz]);
    }

    return ans;
}

Compilation message

longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:132:22: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  132 |         int mid = lo + hi >> 1;
      |                   ~~~^~~~
longesttrip.cpp:144:22: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  144 |         int mid = lo + hi >> 1;
      |                   ~~~^~~~

Subtask #0
0.0 / 0.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 2 ms 344 KB Output is correct

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 344 KB Output is correct
2 Correct 8 ms 344 KB Output is correct
3 Correct 5 ms 344 KB Output is correct
4 Correct 5 ms 600 KB Output is correct
5 Correct 5 ms 452 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 344 KB Output is correct
2 Correct 7 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 8 ms 344 KB Output is correct
7 Correct 10 ms 344 KB Output is correct
8 Correct 6 ms 340 KB Output is correct
9 Correct 6 ms 344 KB Output is correct
10 Correct 5 ms 452 KB Output is correct
11 Correct 5 ms 456 KB Output is correct
12 Correct 5 ms 452 KB Output is correct
13 Correct 5 ms 464 KB Output is correct

Subtask #3
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 344 KB Output is correct
2 Correct 8 ms 344 KB Output is correct
3 Correct 5 ms 344 KB Output is correct
4 Correct 6 ms 600 KB Output is correct
5 Correct 5 ms 600 KB Output is correct
6 Correct 9 ms 596 KB Output is correct
7 Correct 7 ms 344 KB Output is correct
8 Correct 6 ms 344 KB Output is correct
9 Correct 5 ms 344 KB Output is correct
10 Correct 6 ms 800 KB Output is correct
11 Correct 6 ms 452 KB Output is correct
12 Correct 5 ms 708 KB Output is correct
13 Correct 5 ms 600 KB Output is correct
14 Correct 6 ms 344 KB Output is correct
15 Correct 7 ms 344 KB Output is correct
16 Correct 6 ms 344 KB Output is correct
17 Correct 6 ms 344 KB Output is correct
18 Correct 8 ms 600 KB Output is correct
19 Correct 7 ms 852 KB Output is correct
20 Correct 6 ms 600 KB Output is correct
21 Correct 5 ms 712 KB Output is correct
22 Correct 5 ms 860 KB Output is correct
23 Correct 5 ms 604 KB Output is correct
24 Correct 5 ms 1112 KB Output is correct
25 Correct 6 ms 344 KB Output is correct
26 Correct 5 ms 344 KB Output is correct
27 Correct 6 ms 344 KB Output is correct
28 Correct 6 ms 344 KB Output is correct
29 Correct 7 ms 344 KB Output is correct
30 Correct 6 ms 344 KB Output is correct
31 Correct 6 ms 596 KB Output is correct
32 Correct 6 ms 344 KB Output is correct
33 Correct 6 ms 344 KB Output is correct
34 Correct 6 ms 344 KB Output is correct
35 Correct 6 ms 504 KB Output is correct
36 Correct 6 ms 600 KB Output is correct
37 Correct 7 ms 608 KB Output is correct
38 Correct 6 ms 344 KB Output is correct
39 Correct 6 ms 344 KB Output is correct
40 Correct 6 ms 344 KB Output is correct
41 Correct 6 ms 600 KB Output is correct
42 Correct 6 ms 600 KB Output is correct
43 Correct 8 ms 456 KB Output is correct
44 Correct 6 ms 600 KB Output is correct
45 Correct 8 ms 344 KB Output is correct
46 Correct 12 ms 344 KB Output is correct
47 Correct 8 ms 344 KB Output is correct
48 Correct 8 ms 344 KB Output is correct
49 Correct 12 ms 344 KB Output is correct
50 Correct 6 ms 440 KB Output is correct
51 Correct 8 ms 440 KB Output is correct
52 Correct 9 ms 436 KB Output is correct
53 Correct 7 ms 852 KB Output is correct
54 Correct 6 ms 448 KB Output is correct
55 Correct 7 ms 696 KB Output is correct
56 Correct 6 ms 968 KB Output is correct
57 Correct 7 ms 720 KB Output is correct
58 Correct 7 ms 872 KB Output is correct
59 Correct 7 ms 612 KB Output is correct
60 Correct 8 ms 612 KB Output is correct
61 Correct 7 ms 604 KB Output is correct
62 Correct 7 ms 716 KB Output is correct
63 Correct 7 ms 864 KB Output is correct
64 Correct 9 ms 604 KB Output is correct

Subtask #4
60.0 / 60.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 344 KB Output is correct
2 Correct 8 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 624 KB Output is correct
6 Correct 8 ms 344 KB Output is correct
7 Correct 7 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 5 ms 600 KB Output is correct
11 Correct 6 ms 456 KB Output is correct
12 Correct 5 ms 448 KB Output is correct
13 Correct 5 ms 604 KB Output is correct
14 Correct 8 ms 344 KB Output is correct
15 Correct 6 ms 344 KB Output is correct
16 Correct 7 ms 344 KB Output is correct
17 Correct 6 ms 344 KB Output is correct
18 Correct 6 ms 600 KB Output is correct
19 Correct 6 ms 600 KB Output is correct
20 Correct 6 ms 440 KB Output is correct
21 Correct 6 ms 344 KB Output is correct
22 Correct 7 ms 344 KB Output is correct
23 Correct 8 ms 344 KB Output is correct
24 Correct 6 ms 344 KB Output is correct
25 Correct 7 ms 344 KB Output is correct
26 Correct 6 ms 344 KB Output is correct
27 Correct 7 ms 440 KB Output is correct
28 Correct 6 ms 344 KB Output is correct
29 Correct 6 ms 344 KB Output is correct
30 Correct 6 ms 344 KB Output is correct
31 Correct 5 ms 344 KB Output is correct
32 Correct 13 ms 344 KB Output is correct
33 Correct 9 ms 344 KB Output is correct
34 Correct 8 ms 344 KB Output is correct
35 Correct 8 ms 344 KB Output is correct
36 Correct 9 ms 344 KB Output is correct
37 Correct 6 ms 440 KB Output is correct
38 Correct 7 ms 600 KB Output is correct
39 Correct 7 ms 436 KB Output is correct
40 Correct 6 ms 600 KB Output is correct
41 Correct 6 ms 448 KB Output is correct
42 Correct 6 ms 344 KB Output is correct
43 Correct 5 ms 456 KB Output is correct
44 Correct 5 ms 708 KB Output is correct
45 Correct 6 ms 456 KB Output is correct
46 Correct 5 ms 608 KB Output is correct
47 Correct 6 ms 540 KB Output is correct
48 Correct 6 ms 600 KB Output is correct
49 Correct 6 ms 344 KB Output is correct
50 Correct 7 ms 452 KB Output is correct
51 Correct 6 ms 344 KB Output is correct
52 Correct 7 ms 344 KB Output is correct
53 Correct 6 ms 600 KB Output is correct
54 Correct 7 ms 600 KB Output is correct
55 Correct 8 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 6 ms 340 KB Output is correct
59 Correct 7 ms 600 KB Output is correct
60 Correct 6 ms 600 KB Output is correct
61 Correct 6 ms 600 KB Output is correct
62 Correct 5 ms 724 KB Output is correct
63 Correct 6 ms 720 KB Output is correct
64 Correct 7 ms 604 KB Output is correct
65 Correct 9 ms 724 KB Output is correct
66 Correct 7 ms 860 KB Output is correct
67 Correct 8 ms 600 KB Output is correct
68 Correct 7 ms 716 KB Output is correct
69 Correct 7 ms 888 KB Output is correct
70 Correct 7 ms 600 KB Output is correct
71 Correct 6 ms 712 KB Output is correct
72 Correct 7 ms 724 KB Output is correct
73 Correct 8 ms 856 KB Output is correct
74 Correct 9 ms 852 KB Output is correct
75 Correct 8 ms 864 KB Output is correct
76 Correct 7 ms 708 KB Output is correct
77 Correct 7 ms 724 KB Output is correct
78 Correct 6 ms 856 KB Output is correct
79 Correct 8 ms 608 KB Output is correct
80 Correct 7 ms 712 KB Output is correct
81 Correct 8 ms 456 KB Output is correct
82 Correct 8 ms 712 KB Output is correct