oj.uz

Submission #416338

# Submission time Handle Problem Language Result Execution time Memory
416338 2021-06-02T10:29:16 Z idk321 Sky Walking (IOI19_walk) C++17
0 / 100
 4000 ms 797604 KB 
#include "walk.h"

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;


const int M = 2000005;
const int N = 100005;
const ll INF = 2000000000000000000LL;
vector<array<int, 2>> adj[M];
vector<array<int, 2>> isAt[N];

int cnode = 0;


///usr/include/c++/10/bits/stl_heap.h|209|error: ‘bool Comparator::operator()(const std::__debug::array<long long int, 2>&, const std::__debug::array<long long int, 2>&) const’ is private within this context|

struct Comparator
{

    bool operator() (const array<ll, 2>& ar1, const array<ll, 2>& ar2) const
    {
        return tie(ar1[1], ar1[0]) < tie(ar2[1], ar2[0]);
    }
};

long long min_distance(std::vector<int> x, std::vector<int> h, std::vector<int> l, std::vector<int> r, std::vector<int> y, int s, int g) {

    int snode = -1;
    int gnode = -1;
    for (int i = 0; i < x.size(); i++)
    {
        isAt[i].push_back({cnode, 0});
        if (i == s)
        {
            snode = cnode;
        }
        if (i == g)
        {
            gnode = cnode;
        }
        cnode++;
    }



    vector<array<int, 2>> byHeight;
    for (int i = 0; i < l.size(); i++)
    {
        byHeight.push_back({y[i], i});
    }
    sort(byHeight.begin(), byHeight.end());

    set<int> ok;

    for (int i = 0; i < x.size(); i++) ok.insert(i);

    for (int ci = 0; ci < l.size(); ci++)
    {
        int i = byHeight[ci][1];
        int prev = -1;
        for (auto it = ok.lower_bound(l[i]); it != ok.end() && *it <= r[i]; )
        {
            int j = *it;
            if (h[j] >= y[i])
            {
                for (auto ar : isAt[j])
                {
                    adj[cnode].push_back({ar[0], abs(ar[1] - y[i])});
                    adj[ar[0]].push_back({cnode, abs(ar[1] - y[i])});
                }

                isAt[j].push_back({cnode, y[i]});
                if (prev != -1)
                {
                    adj[cnode].push_back({cnode - 1, x[j] - x[prev]});
                    adj[cnode - 1].push_back({cnode, x[j] - x[prev]});
                }
                prev = j;
                cnode++;
                it++;
            } else
            {
                it = ok.erase(it);
            }
        }
    }

    set<array<ll, 2>, Comparator> sett;

    sett.insert({snode, 0});

    vector<ll> dist(M, INF);
    dist[snode] = 0;
    while (!sett.empty())
    {
        auto cur = *sett.begin();
        sett.erase(sett.begin());



        for (auto next : adj[cur[0]])
        {
            if (cur[1] + next[1] < dist[next[0]])
            {
                if (dist[next[0]] != INF)
                {
                    sett.erase({next[0], dist[next[1]]});
                }
                dist[next[0]] = cur[1] + next[1];
                sett.insert({next[0], cur[1] + next[1]});
            }

        }
    }



    if (dist[gnode] == INF) return -1;
	return dist[gnode];
}

Compilation message

walk.cpp: In function 'long long int min_distance(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, int, int)':
walk.cpp:32:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |     for (int i = 0; i < x.size(); i++)
      |                     ~~^~~~~~~~~~
walk.cpp:49:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |     for (int i = 0; i < l.size(); i++)
      |                     ~~^~~~~~~~~~
walk.cpp:57:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |     for (int i = 0; i < x.size(); i++) ok.insert(i);
      |                     ~~^~~~~~~~~~
walk.cpp:59:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   59 |     for (int ci = 0; ci < l.size(); ci++)
      |                      ~~~^~~~~~~~~~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 65220 KB Output is correct
2 Correct 36 ms 65160 KB Output is correct
3 Correct 41 ms 65240 KB Output is correct
4 Correct 37 ms 65228 KB Output is correct
5 Correct 37 ms 65380 KB Output is correct
6 Runtime error 97 ms 132292 KB Execution killed with signal 11
7 Halted 0 ms 0 KB -

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 65228 KB Output is correct
2 Correct 37 ms 65232 KB Output is correct
3 Execution timed out 4161 ms 797604 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 305 ms 86460 KB Output is correct
2 Execution timed out 4103 ms 572772 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 305 ms 86460 KB Output is correct
2 Execution timed out 4103 ms 572772 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 65220 KB Output is correct
2 Correct 36 ms 65160 KB Output is correct
3 Correct 41 ms 65240 KB Output is correct
4 Correct 37 ms 65228 KB Output is correct
5 Correct 37 ms 65380 KB Output is correct
6 Runtime error 97 ms 132292 KB Execution killed with signal 11
7 Halted 0 ms 0 KB -