oj.uz

Submission #902107

# Submission time Handle Problem Language Result Execution time Memory
902107 2024-01-10T06:04:26 Z abcvuitunggio Sky Walking (IOI19_walk) C++17
43 / 100
 848 ms 625732 KB 
#include "walk.h"
#include <bits/stdc++.h>
#define int long long
using namespace std;
const int INF=1e18;
priority_queue <pair <int, int>, vector <pair <int, int>>, greater <pair <int, int>>> q;
vector <int> a[100001],b[100001],V;
vector <int32_t> x,h,l,r,y;
vector <pair <int, int>> ke[12000001],ve;
vector <pair <int32_t, int32_t>> nodes;
int n,m,d[12000001];
set <int> S;
void add(int i, int j){
    a[i].push_back(j);
    nodes.push_back({x[i],(j==-1?0:y[j])});
}
int f(int i, int j){
    return lower_bound(nodes.begin(),nodes.end(),make_pair(x[i],(j==-1?0:y[j])))-nodes.begin();
}
void reconnect(int32_t s, int mode){
    vector <pair <int32_t, int32_t>> tmp,changes;
    for (int i=s;(mode?i<n:i>=0);i+=mode*2-1)
        if (tmp.empty()||h[i]>tmp.back().first)
            tmp.push_back({h[i],i});
    for (int i=0;i<l.size();i++)
        if (l[i]<s&&s<r[i]){
            auto a=tmp[lower_bound(tmp.begin(),tmp.end(),make_pair(y[i],-1))-tmp.begin()];
            changes.push_back({i,a.second});
        }
    for (auto [i,j]:changes){
        if (j==l[i]||j==r[i])
            continue;
        if (mode)
            swap(l,r);
        l.push_back(j);
        r.push_back(r[i]);
        y.push_back(y[i]);
        r[i]=j;
        if (mode)
            swap(l,r);
    }
}
int min_distance(vector<int32_t> X, vector<int32_t> H, vector<int32_t> L, vector<int32_t> R, vector<int32_t> Y, int32_t s, int32_t g){
    x=X,h=H,l=L,r=R,y=Y,n=x.size();
    if (s>g)
        swap(s,g);
    reconnect(s,0);
    reconnect(s,1);
    reconnect(g,0);
    reconnect(g,1);
    m=l.size();
    for (int i=0;i<m;i++){
        ve.push_back({l[i],i});
        ve.push_back({r[i],i});
    }
    sort(ve.begin(),ve.end(),[](pair <int, int> a, pair <int, int> b){
            if (a.first!=b.first)
                return a.first<b.first;
            bool p=(a.first==r[a.second]),q=(b.first==r[b.second]);
            if (p!=q)
                return p<q;
            if (p)
                return y[a.second]>y[b.second];
            return y[a.second]<y[b.second];
         });
    set <pair <int, int>> cur;
    for (auto [i,j]:ve){
        add(i,j);
        b[j].push_back(i);
        if (i==l[j])
            cur.insert({y[j],j});
        else
            cur.erase({y[j],j});
        if (!cur.empty()){
            auto it=cur.lower_bound(make_pair(y[j],-1));
            if (it!=cur.begin()){
                it--;
                add(i,(*it).second);
                b[(*it).second].push_back(i);
            }
        }
    }
    for (int i=0;i<n;i++)
        sort(a[i].begin(),a[i].end(),[](int i, int j){return y[i]>y[j];});
    for (int i=0;i<m;i++)
        sort(b[i].begin(),b[i].end(),[](int i, int j){return x[i]<x[j];});
    add(s,-1);
    add(g,-1);
    sort(nodes.begin(),nodes.end());
    nodes.resize(unique(nodes.begin(),nodes.end())-nodes.begin());
    for (int i=0;i<n;i++)
        for (int j=0;j<(int)a[i].size()-1;j++){
            int u=f(i,a[i][j]),v=f(i,a[i][j+1]),w=(a[i][j]>=0?y[a[i][j]]:0)-(a[i][j+1]>=0?y[a[i][j+1]]:0);
            if (u==v)
                continue;
            ke[u].push_back({v,w});
            ke[v].push_back({u,w});
        }
    for (int i=0;i<m;i++)
        for (int j=0;j<(int)b[i].size()-1;j++){
            int u=f(b[i][j],i),v=f(b[i][j+1],i),w=x[b[i][j+1]]-x[b[i][j]];
            if (u==v)
                continue;
            ke[u].push_back({v,w});
            ke[v].push_back({u,w});
        }
    fill(d,d+nodes.size(),INF);
    d[f(s,-1)]=0;
    q.push({0,f(s,-1)});
    while (!q.empty()){
        auto [du,u]=q.top();
        q.pop();
        if (du!=d[u])
            continue;
        for (auto [v,w]:ke[u])
            if (d[v]>d[u]+w){
                d[v]=d[u]+w;
                q.push({d[v],v});
            }
    }
    return (d[f(g,-1)]==INF?-1:d[f(g,-1)]);
}

Compilation message

walk.cpp: In function 'void reconnect(int32_t, long long int)':
walk.cpp:25:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |     for (int i=0;i<l.size();i++)
      |                  ~^~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 288340 KB Output is correct
2 Correct 68 ms 288340 KB Output is correct
3 Correct 61 ms 288340 KB Output is correct
4 Correct 62 ms 288336 KB Output is correct
5 Correct 64 ms 288376 KB Output is correct
6 Correct 62 ms 288336 KB Output is correct
7 Correct 65 ms 288156 KB Output is correct
8 Correct 61 ms 288316 KB Output is correct
9 Correct 61 ms 288292 KB Output is correct
10 Correct 62 ms 288340 KB Output is correct
11 Correct 61 ms 288320 KB Output is correct
12 Correct 63 ms 288292 KB Output is correct
13 Correct 62 ms 288336 KB Output is correct
14 Correct 64 ms 288340 KB Output is correct
15 Correct 61 ms 288336 KB Output is correct
16 Correct 61 ms 288340 KB Output is correct
17 Correct 65 ms 288340 KB Output is correct

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 61 ms 288316 KB Output is correct
2 Correct 65 ms 288340 KB Output is correct
3 Runtime error 406 ms 625732 KB Execution killed with signal 11
4 Halted 0 ms 0 KB -

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 179 ms 304732 KB Output is correct
2 Correct 655 ms 347580 KB Output is correct
3 Correct 687 ms 348600 KB Output is correct
4 Correct 706 ms 348608 KB Output is correct
5 Correct 848 ms 354060 KB Output is correct
6 Correct 804 ms 349756 KB Output is correct
7 Correct 336 ms 318824 KB Output is correct
8 Correct 306 ms 321976 KB Output is correct
9 Correct 691 ms 348752 KB Output is correct
10 Correct 385 ms 324796 KB Output is correct
11 Correct 71 ms 289648 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 179 ms 304732 KB Output is correct
2 Correct 655 ms 347580 KB Output is correct
3 Correct 687 ms 348600 KB Output is correct
4 Correct 706 ms 348608 KB Output is correct
5 Correct 848 ms 354060 KB Output is correct
6 Correct 804 ms 349756 KB Output is correct
7 Correct 336 ms 318824 KB Output is correct
8 Correct 306 ms 321976 KB Output is correct
9 Correct 691 ms 348752 KB Output is correct
10 Correct 385 ms 324796 KB Output is correct
11 Correct 71 ms 289648 KB Output is correct
12 Correct 689 ms 348456 KB Output is correct
13 Correct 552 ms 347616 KB Output is correct
14 Correct 808 ms 353380 KB Output is correct
15 Correct 572 ms 342092 KB Output is correct
16 Correct 594 ms 343740 KB Output is correct
17 Correct 618 ms 349888 KB Output is correct
18 Correct 525 ms 340480 KB Output is correct
19 Correct 567 ms 343484 KB Output is correct
20 Correct 351 ms 318468 KB Output is correct
21 Correct 81 ms 291188 KB Output is correct
22 Correct 439 ms 339640 KB Output is correct
23 Correct 466 ms 338636 KB Output is correct
24 Correct 337 ms 326556 KB Output is correct
25 Correct 364 ms 331036 KB Output is correct
26 Correct 293 ms 321720 KB Output is correct
27 Correct 805 ms 353240 KB Output is correct
28 Correct 531 ms 347180 KB Output is correct
29 Correct 767 ms 348712 KB Output is correct
30 Correct 358 ms 318940 KB Output is correct
31 Correct 746 ms 346576 KB Output is correct
32 Correct 358 ms 324580 KB Output is correct
33 Correct 344 ms 322520 KB Output is correct
34 Correct 426 ms 326452 KB Output is correct
35 Correct 431 ms 327900 KB Output is correct
36 Correct 358 ms 326588 KB Output is correct
37 Correct 348 ms 323560 KB Output is correct
38 Correct 307 ms 320804 KB Output is correct
39 Correct 440 ms 329160 KB Output is correct
40 Correct 358 ms 323564 KB Output is correct
41 Correct 305 ms 322744 KB Output is correct

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 288340 KB Output is correct
2 Correct 68 ms 288340 KB Output is correct
3 Correct 61 ms 288340 KB Output is correct
4 Correct 62 ms 288336 KB Output is correct
5 Correct 64 ms 288376 KB Output is correct
6 Correct 62 ms 288336 KB Output is correct
7 Correct 65 ms 288156 KB Output is correct
8 Correct 61 ms 288316 KB Output is correct
9 Correct 61 ms 288292 KB Output is correct
10 Correct 62 ms 288340 KB Output is correct
11 Correct 61 ms 288320 KB Output is correct
12 Correct 63 ms 288292 KB Output is correct
13 Correct 62 ms 288336 KB Output is correct
14 Correct 64 ms 288340 KB Output is correct
15 Correct 61 ms 288336 KB Output is correct
16 Correct 61 ms 288340 KB Output is correct
17 Correct 65 ms 288340 KB Output is correct
18 Correct 61 ms 288316 KB Output is correct
19 Correct 65 ms 288340 KB Output is correct
20 Runtime error 406 ms 625732 KB Execution killed with signal 11
21 Halted 0 ms 0 KB -