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답안 #875043

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
875043 2023-11-18T14:58:20 Z garam1732 Pinball (JOI14_pinball) C++14
51 / 100
 1000 ms 516232 KB 
#include <bits/stdc++.h>
using namespace std;

#define ff first
#define ss second
#define bl " "
#define endl "\n"
#define all(v) v.begin(), v.end()
#define comp(v) v.erase(unique(all(v)), v.end())
typedef long long ll;
typedef pair<int, int> pi;
typedef pair<int, pi> pii;
typedef pair<ll, ll> pll;

const int MAXN = 100100;
const int MOD = 1e9+7;

struct Wall {
    int a, b, c, d;
}wall[MAXN];

vector<pi> cp;

vector<int> ls[1<<20];
int cnt;

vector<pi> adj[1<<20];
int num[1<<20], idx[1<<20];

void init(int node, int s, int e) {
    //v.push_back(pi(node, 0));
    ls[node].push_back(cnt++);

    if(s == e) {
        num[s] = node;
        return;
    }

    int mid = s+e>>1;
    init(node<<1, s, mid); init(node<<1|1, mid+1, e);
    adj[ls[node<<1][0]].push_back(pi(ls[node][0], 0)); adj[ls[node<<1|1][0]].push_back(pi(ls[node][0], 0));
}

void update(int node, int s, int e, int l, int r, pi v) {
    if(e < l || r < s) return;
    if(l <= s && e <= r) {
        for(int x : ls[node]) adj[x].push_back(v);
        return;
    }

    int mid = s+e>>1;
    update(node<<1, s, mid, l, r, v); update(node<<1|1, mid+1, e, l, r, v);
}

vector<ll> d1, d2;

void dijkstra(int s, vector<ll>& d) {
    d.resize(cnt, LLONG_MAX); d[s] = 0;
    priority_queue<pll> pq; pq.push(pll(0, s));
    while(pq.size()) {
        int here = pq.top().ss; ll cost = -pq.top().ff; pq.pop();
       // cout<<'a'<<here.ff<<bl<<here.ss<<bl<<cost<<endl;

        if(d[here] != cost) continue;

        for(auto [there, w] : adj[here]) {
            if(d[there] > cost+w) {
                d[there] = cost+w;
                pq.push(pll(-d[there], there));
            }
        }
    }
}

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0);

    int m, n; cin >> m >> n;
    for(int i = 1; i <= m; i++) cin >> wall[i].a >> wall[i].b >> wall[i].c >> wall[i].d;

    for(int i = 1; i <= m; i++) cp.push_back(pi(wall[i].c, i));
    cp.push_back(pi(1, 0)); cp.push_back(pi(n, 0));

    sort(all(cp)); comp(cp);

    int sz = cp.size();
    init(1, 0, sz-1);
    for(int i = 1; i <= m; i++) {
        wall[i].a = lower_bound(all(cp), pi(wall[i].a, 0))-cp.begin();
        wall[i].b = lower_bound(all(cp), pi(wall[i].b+1, 0))-cp.begin()-1;
        wall[i].c = lower_bound(all(cp), pi(wall[i].c, i))-cp.begin();

        idx[i] = cnt;
        ls[num[wall[i].c]].push_back(cnt);
        update(1, 0, sz-1, wall[i].a, wall[i].b, pi(cnt++, wall[i].d));
        int x = num[wall[i].c]>>1;
        while(x) {
            adj[cnt-1].push_back(pi(cnt, 0));
            ls[x].push_back(cnt++);
            x >>= 1;
        }
    }

    dijkstra(ls[num[0]][0], d1); dijkstra(ls[num[sz-1]][0], d2);

//    for(auto x : mp1) {
//        cout<<x.ff.ff<<bl<<x.ff.ss<<bl<<x.ss<<endl;
//    }

    ll ans = LLONG_MAX;
    for(int i = 1; i <= m; i++) {
        int x = idx[i];
        if(d1[x] < LLONG_MAX && d2[x] < LLONG_MAX)
            ans = min(ans, d1[x]+d2[x]-wall[i].d);

        if(wall[i].c == 0 && d2[x] < LLONG_MAX) ans = min(ans, d2[x]);
        if(wall[i].c == sz-1 && d1[x] < LLONG_MAX) ans = min(ans, d1[x]);
    }

    cout << (ans == LLONG_MAX ? -1 : ans);
}

Compilation message

pinball.cpp: In function 'void init(int, int, int)':
pinball.cpp:39:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   39 |     int mid = s+e>>1;
      |               ~^~
pinball.cpp: In function 'void update(int, int, int, int, int, pi)':
pinball.cpp:51:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   51 |     int mid = s+e>>1;
      |               ~^~
pinball.cpp: In function 'void dijkstra(int, std::vector<long long int>&)':
pinball.cpp:66:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   66 |         for(auto [there, w] : adj[here]) {
      |                  ^

Subtask #1
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 53596 KB Output is correct
2 Correct 11 ms 53596 KB Output is correct
3 Correct 11 ms 53596 KB Output is correct
4 Correct 11 ms 53596 KB Output is correct
5 Correct 11 ms 53596 KB Output is correct
6 Correct 11 ms 53592 KB Output is correct
7 Correct 11 ms 53592 KB Output is correct
8 Correct 11 ms 53592 KB Output is correct

Subtask #2
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 53596 KB Output is correct
2 Correct 11 ms 53596 KB Output is correct
3 Correct 11 ms 53596 KB Output is correct
4 Correct 11 ms 53596 KB Output is correct
5 Correct 11 ms 53596 KB Output is correct
6 Correct 11 ms 53592 KB Output is correct
7 Correct 11 ms 53592 KB Output is correct
8 Correct 11 ms 53592 KB Output is correct
9 Correct 12 ms 53852 KB Output is correct
10 Correct 12 ms 53852 KB Output is correct
11 Correct 12 ms 54020 KB Output is correct
12 Correct 13 ms 53848 KB Output is correct
13 Correct 14 ms 53852 KB Output is correct
14 Correct 11 ms 53848 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 53596 KB Output is correct
2 Correct 11 ms 53596 KB Output is correct
3 Correct 11 ms 53596 KB Output is correct
4 Correct 11 ms 53596 KB Output is correct
5 Correct 11 ms 53596 KB Output is correct
6 Correct 11 ms 53592 KB Output is correct
7 Correct 11 ms 53592 KB Output is correct
8 Correct 11 ms 53592 KB Output is correct
9 Correct 12 ms 53852 KB Output is correct
10 Correct 12 ms 53852 KB Output is correct
11 Correct 12 ms 54020 KB Output is correct
12 Correct 13 ms 53848 KB Output is correct
13 Correct 14 ms 53852 KB Output is correct
14 Correct 11 ms 53848 KB Output is correct
15 Correct 11 ms 53848 KB Output is correct
16 Correct 12 ms 54108 KB Output is correct
17 Correct 18 ms 56668 KB Output is correct
18 Correct 19 ms 56668 KB Output is correct
19 Correct 17 ms 56776 KB Output is correct
20 Correct 21 ms 56664 KB Output is correct
21 Correct 12 ms 54116 KB Output is correct
22 Correct 14 ms 54920 KB Output is correct
23 Correct 13 ms 54512 KB Output is correct
24 Correct 16 ms 54364 KB Output is correct

Subtask #4
0 / 49.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 53596 KB Output is correct
2 Correct 11 ms 53596 KB Output is correct
3 Correct 11 ms 53596 KB Output is correct
4 Correct 11 ms 53596 KB Output is correct
5 Correct 11 ms 53596 KB Output is correct
6 Correct 11 ms 53592 KB Output is correct
7 Correct 11 ms 53592 KB Output is correct
8 Correct 11 ms 53592 KB Output is correct
9 Correct 12 ms 53852 KB Output is correct
10 Correct 12 ms 53852 KB Output is correct
11 Correct 12 ms 54020 KB Output is correct
12 Correct 13 ms 53848 KB Output is correct
13 Correct 14 ms 53852 KB Output is correct
14 Correct 11 ms 53848 KB Output is correct
15 Correct 11 ms 53848 KB Output is correct
16 Correct 12 ms 54108 KB Output is correct
17 Correct 18 ms 56668 KB Output is correct
18 Correct 19 ms 56668 KB Output is correct
19 Correct 17 ms 56776 KB Output is correct
20 Correct 21 ms 56664 KB Output is correct
21 Correct 12 ms 54116 KB Output is correct
22 Correct 14 ms 54920 KB Output is correct
23 Correct 13 ms 54512 KB Output is correct
24 Correct 16 ms 54364 KB Output is correct
25 Correct 527 ms 264864 KB Output is correct
26 Execution timed out 1046 ms 516232 KB Time limit exceeded
27 Halted 0 ms 0 KB -