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답안 #736118

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
736118 2023-05-05T08:42:12 Z nguyentunglam Passport (JOI23_passport) C++17
100 / 100
 862 ms 85324 KB 
#include<bits/stdc++.h>
#define fi first
#define se second
#define endl "\n"
#define ii pair<int, int>
using namespace std;
const int N = 8e5 + 10;
int f[N], g[N], h[N], p[N];
bool mark[N];
vector<ii> adj[N];
priority_queue<ii, vector<ii>, greater<ii> > q;
void calc(int start, int d[]) {
    d[start] = 0;
    q.push({0, start});
    while (!q.empty()) {
        int cost, u; tie(cost, u) = q.top(); q.pop();
        if (d[u] != cost) continue;
        for(auto &[v, w] : adj[u]) if (d[v] > d[u] + w) d[v] = d[u] + w, q.push({d[v], v});
    }
}

void init(int s, int l, int r) {
    if (l == r) {
        mark[s] = 1;
        p[l] = s;
        return;
    }
    adj[s << 1].emplace_back(s, 0);
    adj[s << 1 | 1].emplace_back(s, 0);
    int mid = l + r >> 1;
    init(s << 1, l, mid);
    init(s << 1 | 1, mid + 1, r);
}

void add(int s, int l, int r, int from, int to, int idx) {
    if (l > to || r < from) return;
    if (from <= l && r <= to) {
        adj[s].emplace_back(p[idx], 1);
        return;
    }
    int mid = l + r >> 1;
    add(s << 1, l, mid, from, to, idx);
    add(s << 1 | 1, mid + 1, r, from, to, idx);
}

int main() {
    #define task ""
    cin.tie(0) -> sync_with_stdio(0);
    if (fopen ("task.inp", "r")) {
        freopen ("task.inp", "r", stdin);
        freopen ("task.out", "w", stdout);
    }
    if (fopen (task".inp", "r")) {
        freopen (task".inp", "r", stdin);
        freopen (task".out", "w", stdout);
    }

    int n; cin >> n;
    init(1, 1, n);
    for(int i = 1; i <= n; i++) {
        int l, r; cin >> l >> r;
        add(1, 1, n, l, r, i);
    }
    for(int i = 1; i <= 4 * n; i++) f[i] = g[i] = 1e9;
    calc(p[1], f);
    calc(p[n], g);

    for(int i = 1; i <= 4 * n; i++) {
        if (i == p[1] || i == p[n]) h[i] = f[i] + g[i];
        else h[i] = f[i] + g[i] - mark[i];
        q.push({h[i], i});
    }

    while (!q.empty()) {
        int cost, u; tie(cost, u) = q.top(); q.pop();
        if (cost != h[u]) continue;
        for(auto &[v, w] : adj[u]) if (h[v] > h[u] + w) {
            h[v] = h[u] + w;
            q.push({h[v], v});
        }
    }

    for(int i = 1; i <= 4 * n; i++) if (h[i] > 1e8) h[i] = -1;

    int q; cin >> q;
    while (q--) {
        int x; cin >> x;
        cout << h[p[x]] << endl;
    }
}

Compilation message

passport.cpp: In function 'void init(int, int, int)':
passport.cpp:30:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   30 |     int mid = l + r >> 1;
      |               ~~^~~
passport.cpp: In function 'void add(int, int, int, int, int, int)':
passport.cpp:41:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   41 |     int mid = l + r >> 1;
      |               ~~^~~
passport.cpp: In function 'int main()':
passport.cpp:50:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |         freopen ("task.inp", "r", stdin);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
passport.cpp:51:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |         freopen ("task.out", "w", stdout);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
passport.cpp:54:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   54 |         freopen (task".inp", "r", stdin);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
passport.cpp:55:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   55 |         freopen (task".out", "w", stdout);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 19028 KB Output is correct
2 Correct 11 ms 19024 KB Output is correct
3 Correct 10 ms 19028 KB Output is correct
4 Correct 826 ms 77844 KB Output is correct
5 Correct 392 ms 57836 KB Output is correct
6 Correct 234 ms 52540 KB Output is correct
7 Correct 275 ms 50536 KB Output is correct
8 Correct 235 ms 56844 KB Output is correct

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 19028 KB Output is correct
2 Correct 11 ms 19112 KB Output is correct
3 Correct 10 ms 19144 KB Output is correct
4 Correct 11 ms 19120 KB Output is correct
5 Correct 12 ms 19084 KB Output is correct
6 Correct 11 ms 19108 KB Output is correct
7 Correct 11 ms 19092 KB Output is correct
8 Correct 11 ms 19028 KB Output is correct
9 Correct 11 ms 19152 KB Output is correct
10 Correct 10 ms 19028 KB Output is correct
11 Correct 11 ms 19156 KB Output is correct
12 Correct 12 ms 19224 KB Output is correct
13 Correct 12 ms 19156 KB Output is correct
14 Correct 10 ms 19156 KB Output is correct
15 Correct 11 ms 19252 KB Output is correct

Subtask #3
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 19028 KB Output is correct
2 Correct 11 ms 19112 KB Output is correct
3 Correct 10 ms 19144 KB Output is correct
4 Correct 11 ms 19120 KB Output is correct
5 Correct 12 ms 19084 KB Output is correct
6 Correct 11 ms 19108 KB Output is correct
7 Correct 11 ms 19092 KB Output is correct
8 Correct 11 ms 19028 KB Output is correct
9 Correct 11 ms 19152 KB Output is correct
10 Correct 10 ms 19028 KB Output is correct
11 Correct 11 ms 19156 KB Output is correct
12 Correct 12 ms 19224 KB Output is correct
13 Correct 12 ms 19156 KB Output is correct
14 Correct 10 ms 19156 KB Output is correct
15 Correct 11 ms 19252 KB Output is correct
16 Correct 14 ms 19796 KB Output is correct
17 Correct 14 ms 19668 KB Output is correct
18 Correct 14 ms 19924 KB Output is correct
19 Correct 14 ms 19956 KB Output is correct
20 Correct 14 ms 19604 KB Output is correct
21 Correct 14 ms 19668 KB Output is correct
22 Correct 12 ms 19648 KB Output is correct
23 Correct 14 ms 19740 KB Output is correct
24 Correct 13 ms 19852 KB Output is correct

Subtask #4
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 19028 KB Output is correct
2 Correct 11 ms 19112 KB Output is correct
3 Correct 10 ms 19144 KB Output is correct
4 Correct 11 ms 19120 KB Output is correct
5 Correct 12 ms 19084 KB Output is correct
6 Correct 11 ms 19108 KB Output is correct
7 Correct 11 ms 19092 KB Output is correct
8 Correct 11 ms 19028 KB Output is correct
9 Correct 11 ms 19152 KB Output is correct
10 Correct 10 ms 19028 KB Output is correct
11 Correct 11 ms 19156 KB Output is correct
12 Correct 12 ms 19224 KB Output is correct
13 Correct 12 ms 19156 KB Output is correct
14 Correct 10 ms 19156 KB Output is correct
15 Correct 11 ms 19252 KB Output is correct
16 Correct 14 ms 19796 KB Output is correct
17 Correct 14 ms 19668 KB Output is correct
18 Correct 14 ms 19924 KB Output is correct
19 Correct 14 ms 19956 KB Output is correct
20 Correct 14 ms 19604 KB Output is correct
21 Correct 14 ms 19668 KB Output is correct
22 Correct 12 ms 19648 KB Output is correct
23 Correct 14 ms 19740 KB Output is correct
24 Correct 13 ms 19852 KB Output is correct
25 Correct 10 ms 19028 KB Output is correct
26 Correct 10 ms 19148 KB Output is correct
27 Correct 15 ms 19796 KB Output is correct
28 Correct 15 ms 19668 KB Output is correct
29 Correct 14 ms 19708 KB Output is correct
30 Correct 13 ms 19668 KB Output is correct
31 Correct 14 ms 19668 KB Output is correct

Subtask #5
46.0 / 46.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 19028 KB Output is correct
2 Correct 11 ms 19024 KB Output is correct
3 Correct 10 ms 19028 KB Output is correct
4 Correct 826 ms 77844 KB Output is correct
5 Correct 392 ms 57836 KB Output is correct
6 Correct 234 ms 52540 KB Output is correct
7 Correct 275 ms 50536 KB Output is correct
8 Correct 235 ms 56844 KB Output is correct
9 Correct 11 ms 19028 KB Output is correct
10 Correct 11 ms 19112 KB Output is correct
11 Correct 10 ms 19144 KB Output is correct
12 Correct 11 ms 19120 KB Output is correct
13 Correct 12 ms 19084 KB Output is correct
14 Correct 11 ms 19108 KB Output is correct
15 Correct 11 ms 19092 KB Output is correct
16 Correct 11 ms 19028 KB Output is correct
17 Correct 11 ms 19152 KB Output is correct
18 Correct 10 ms 19028 KB Output is correct
19 Correct 11 ms 19156 KB Output is correct
20 Correct 12 ms 19224 KB Output is correct
21 Correct 12 ms 19156 KB Output is correct
22 Correct 10 ms 19156 KB Output is correct
23 Correct 11 ms 19252 KB Output is correct
24 Correct 14 ms 19796 KB Output is correct
25 Correct 14 ms 19668 KB Output is correct
26 Correct 14 ms 19924 KB Output is correct
27 Correct 14 ms 19956 KB Output is correct
28 Correct 14 ms 19604 KB Output is correct
29 Correct 14 ms 19668 KB Output is correct
30 Correct 12 ms 19648 KB Output is correct
31 Correct 14 ms 19740 KB Output is correct
32 Correct 13 ms 19852 KB Output is correct
33 Correct 10 ms 19028 KB Output is correct
34 Correct 10 ms 19148 KB Output is correct
35 Correct 15 ms 19796 KB Output is correct
36 Correct 15 ms 19668 KB Output is correct
37 Correct 14 ms 19708 KB Output is correct
38 Correct 13 ms 19668 KB Output is correct
39 Correct 14 ms 19668 KB Output is correct
40 Correct 862 ms 78220 KB Output is correct
41 Correct 427 ms 58288 KB Output is correct
42 Correct 532 ms 85324 KB Output is correct
43 Correct 521 ms 85192 KB Output is correct
44 Correct 268 ms 53136 KB Output is correct
45 Correct 365 ms 60324 KB Output is correct
46 Correct 183 ms 34884 KB Output is correct
47 Correct 498 ms 60792 KB Output is correct
48 Correct 448 ms 68732 KB Output is correct