oj.uz

답안 #1086843

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1086843 2024-09-11T14:56:58 Z Thanhs Passport (JOI23_passport) C++14
100 / 100
 622 ms 138548 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
// #define double long double
 
#define endl '\n'
#define fastIO ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
#define setmin(x, y) x = min((x), (y))
#define setmax(x, y) x = max((x), (y))
#define sqr(x) ((x) * (x))
#define fi first
#define se second
#define aint(x) x.begin(), x.end()
 
// mt19937 hdp(chrono::high_resolution_clock::now().time_since_epoch().count());
// int rand(int l, int r){return l + ((hdp() % (r - l + 1)) + r - l + 1) % (r - l + 1);}

const int NM = 2e5 + 5;
const int inf = 1e9;

int pos[NM], n, ans[NM];
vector<pair<int, int>> g[4 * NM];
bool imp[4 * NM];

void build(int x = 1, int l = 1, int r = n)
{
    if (l == r)
    {
        imp[x] = (l != 1 && l != n);
        pos[l] = x;
        return;
    }
    int m = l + r >> 1;
    build(x << 1, l, m);
    build(x << 1 | 1, m + 1, r);
    g[x << 1].emplace_back(x, 0);
    g[x << 1 | 1].emplace_back(x, 0);
    // cout << (x << 1) << ' ' << x << ' ' << 0 << endl;
    // cout << (x << 1 | 1) << ' ' << x << ' ' << 0 << endl;
}

void upd(int t, int l, int r, int x = 1, int lx = 1, int rx = n)
{
    if (l > rx || lx > r)
        return;
    if (lx >= l && rx <= r)
    {
        g[x].emplace_back(t, 1);
        // cout << x << ' ' << t << ' ' << 1 << endl;
        return;
    }
    int m = lx + rx >> 1;
    upd(t, l, r, x << 1, lx, m);
    upd(t, l, r, x << 1 | 1, m + 1, rx);
}

pair<int, int> a[NM];

vector<int> bfs(int s)
{
    vector<int> dist(4 * n + 1, inf);
    deque<pair<int, int>> dq;
    dist[s] = 0;
    dq.push_front({0, s});
    while (!dq.empty())
    {
        auto u = dq.front();
        dq.pop_front();
        if (u.fi != dist[u.se])
            continue;
        for (auto v : g[u.se])
            if (dist[v.fi] > u.fi + v.se)
            {
                dist[v.fi] = u.fi + v.se;
                if (v.se)
                    dq.push_back({dist[v.fi], v.fi});
                else
                    dq.push_front({dist[v.fi], v.fi});
            }
    }
    return dist;
}

priority_queue<pair<int, int>, vector<pair<int, int>>, greater<>> pq;

void solve()
{
    cin >> n;
    build();
    for (int i = 1; i <= n; i++)
    {
        cin >> a[i].fi >> a[i].se;
        upd(pos[i], a[i].fi, a[i].se);
    }
    vector<int> dist1 = bfs(pos[1]), dist2 = bfs(pos[n]);
    vector<int> dist(4 * n + 1);
    for (int i = 1; i < dist.size(); i++)
    {
        dist[i] = dist1[i] + dist2[i] - imp[i];
        if (dist[i] < inf)
            pq.push({dist[i], i});
    }
    while (!pq.empty())
    {
        auto u = pq.top();
        pq.pop();
        if (u.fi != dist[u.se])
            continue;
        for (auto v : g[u.se])
            if (dist[v.fi] > u.fi + v.se)
            {
                dist[v.fi] = u.fi + v.se;
                pq.push({dist[v.fi], v.fi});
            }
    }
    for (int i = 1; i <= n; i++)
    {
        if (i == 1)
            ans[i] = (dist2[pos[1]] < inf ? dist2[pos[1]] : -1);
        else if (i == n)
            ans[i] = (dist1[pos[n]] < inf ? dist1[pos[n]] : -1);
        else
            ans[i] = (dist[pos[i]] < inf ? dist[pos[i]] : -1);
    }
    int q; cin >> q;
    while (q--)
    {
        int x;
        cin >> x;
        cout << ans[x] << endl;
    }
}

signed main()
{
    fastIO
    if (fopen("in.txt", "r")) 
    {
        freopen("in.txt", "r", stdin);
        freopen("out.txt", "w", stdout);
    }
    int tc = 1; // cin >> tc;
    while (tc--)
        solve();

}

Compilation message

passport.cpp: In function 'void build(long long int, long long int, long long int)':
passport.cpp:33:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   33 |     int m = l + r >> 1;
      |             ~~^~~
passport.cpp: In function 'void upd(long long int, long long int, long long int, long long int, long long int, long long int)':
passport.cpp:52:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   52 |     int m = lx + rx >> 1;
      |             ~~~^~~~
passport.cpp: In function 'void solve()':
passport.cpp:97:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   97 |     for (int i = 1; i < dist.size(); i++)
      |                     ~~^~~~~~~~~~~~~
passport.cpp: In function 'int main()':
passport.cpp:139:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  139 |         freopen("in.txt", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
passport.cpp:140:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  140 |         freopen("out.txt", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 19032 KB Output is correct
2 Correct 8 ms 19036 KB Output is correct
3 Correct 9 ms 19036 KB Output is correct
4 Correct 582 ms 124756 KB Output is correct
5 Correct 304 ms 84528 KB Output is correct
6 Correct 188 ms 73916 KB Output is correct
7 Correct 147 ms 67652 KB Output is correct
8 Correct 101 ms 74160 KB Output is correct

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 19032 KB Output is correct
2 Correct 9 ms 19032 KB Output is correct
3 Correct 9 ms 19232 KB Output is correct
4 Correct 12 ms 19260 KB Output is correct
5 Correct 10 ms 19032 KB Output is correct
6 Correct 9 ms 19232 KB Output is correct
7 Correct 10 ms 19156 KB Output is correct
8 Correct 9 ms 19036 KB Output is correct
9 Correct 9 ms 19036 KB Output is correct
10 Correct 9 ms 19220 KB Output is correct
11 Correct 9 ms 19292 KB Output is correct
12 Correct 9 ms 19208 KB Output is correct
13 Correct 9 ms 19420 KB Output is correct
14 Correct 9 ms 19292 KB Output is correct
15 Correct 10 ms 19292 KB Output is correct

Subtask #3
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 19032 KB Output is correct
2 Correct 9 ms 19032 KB Output is correct
3 Correct 9 ms 19232 KB Output is correct
4 Correct 12 ms 19260 KB Output is correct
5 Correct 10 ms 19032 KB Output is correct
6 Correct 9 ms 19232 KB Output is correct
7 Correct 10 ms 19156 KB Output is correct
8 Correct 9 ms 19036 KB Output is correct
9 Correct 9 ms 19036 KB Output is correct
10 Correct 9 ms 19220 KB Output is correct
11 Correct 9 ms 19292 KB Output is correct
12 Correct 9 ms 19208 KB Output is correct
13 Correct 9 ms 19420 KB Output is correct
14 Correct 9 ms 19292 KB Output is correct
15 Correct 10 ms 19292 KB Output is correct
16 Correct 12 ms 20316 KB Output is correct
17 Correct 14 ms 20060 KB Output is correct
18 Correct 11 ms 20572 KB Output is correct
19 Correct 16 ms 20572 KB Output is correct
20 Correct 11 ms 20312 KB Output is correct
21 Correct 11 ms 20060 KB Output is correct
22 Correct 9 ms 19800 KB Output is correct
23 Correct 12 ms 20060 KB Output is correct
24 Correct 10 ms 20060 KB Output is correct

Subtask #4
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 19032 KB Output is correct
2 Correct 9 ms 19032 KB Output is correct
3 Correct 9 ms 19232 KB Output is correct
4 Correct 12 ms 19260 KB Output is correct
5 Correct 10 ms 19032 KB Output is correct
6 Correct 9 ms 19232 KB Output is correct
7 Correct 10 ms 19156 KB Output is correct
8 Correct 9 ms 19036 KB Output is correct
9 Correct 9 ms 19036 KB Output is correct
10 Correct 9 ms 19220 KB Output is correct
11 Correct 9 ms 19292 KB Output is correct
12 Correct 9 ms 19208 KB Output is correct
13 Correct 9 ms 19420 KB Output is correct
14 Correct 9 ms 19292 KB Output is correct
15 Correct 10 ms 19292 KB Output is correct
16 Correct 12 ms 20316 KB Output is correct
17 Correct 14 ms 20060 KB Output is correct
18 Correct 11 ms 20572 KB Output is correct
19 Correct 16 ms 20572 KB Output is correct
20 Correct 11 ms 20312 KB Output is correct
21 Correct 11 ms 20060 KB Output is correct
22 Correct 9 ms 19800 KB Output is correct
23 Correct 12 ms 20060 KB Output is correct
24 Correct 10 ms 20060 KB Output is correct
25 Correct 10 ms 19036 KB Output is correct
26 Correct 8 ms 19036 KB Output is correct
27 Correct 16 ms 20316 KB Output is correct
28 Correct 12 ms 20140 KB Output is correct
29 Correct 10 ms 20180 KB Output is correct
30 Correct 11 ms 20056 KB Output is correct
31 Correct 11 ms 20060 KB Output is correct

Subtask #5
46.0 / 46.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 19032 KB Output is correct
2 Correct 8 ms 19036 KB Output is correct
3 Correct 9 ms 19036 KB Output is correct
4 Correct 582 ms 124756 KB Output is correct
5 Correct 304 ms 84528 KB Output is correct
6 Correct 188 ms 73916 KB Output is correct
7 Correct 147 ms 67652 KB Output is correct
8 Correct 101 ms 74160 KB Output is correct
9 Correct 8 ms 19032 KB Output is correct
10 Correct 9 ms 19032 KB Output is correct
11 Correct 9 ms 19232 KB Output is correct
12 Correct 12 ms 19260 KB Output is correct
13 Correct 10 ms 19032 KB Output is correct
14 Correct 9 ms 19232 KB Output is correct
15 Correct 10 ms 19156 KB Output is correct
16 Correct 9 ms 19036 KB Output is correct
17 Correct 9 ms 19036 KB Output is correct
18 Correct 9 ms 19220 KB Output is correct
19 Correct 9 ms 19292 KB Output is correct
20 Correct 9 ms 19208 KB Output is correct
21 Correct 9 ms 19420 KB Output is correct
22 Correct 9 ms 19292 KB Output is correct
23 Correct 10 ms 19292 KB Output is correct
24 Correct 12 ms 20316 KB Output is correct
25 Correct 14 ms 20060 KB Output is correct
26 Correct 11 ms 20572 KB Output is correct
27 Correct 16 ms 20572 KB Output is correct
28 Correct 11 ms 20312 KB Output is correct
29 Correct 11 ms 20060 KB Output is correct
30 Correct 9 ms 19800 KB Output is correct
31 Correct 12 ms 20060 KB Output is correct
32 Correct 10 ms 20060 KB Output is correct
33 Correct 10 ms 19036 KB Output is correct
34 Correct 8 ms 19036 KB Output is correct
35 Correct 16 ms 20316 KB Output is correct
36 Correct 12 ms 20140 KB Output is correct
37 Correct 10 ms 20180 KB Output is correct
38 Correct 11 ms 20056 KB Output is correct
39 Correct 11 ms 20060 KB Output is correct
40 Correct 622 ms 128456 KB Output is correct
41 Correct 329 ms 86712 KB Output is correct
42 Correct 425 ms 138496 KB Output is correct
43 Correct 376 ms 138548 KB Output is correct
44 Correct 235 ms 76108 KB Output is correct
45 Correct 255 ms 87156 KB Output is correct
46 Correct 99 ms 45240 KB Output is correct
47 Correct 340 ms 93872 KB Output is correct
48 Correct 262 ms 102948 KB Output is correct