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Submission #251482

# Submission time Handle Problem Language Result Execution time Memory
251482 2020-07-21T11:55:39 Z eohomegrownapps Jakarta Skyscrapers (APIO15_skyscraper) C++14
100 / 100
 989 ms 175348 KB 
#include <bits/stdc++.h>
using namespace std;
vector<int> smallpowers[30000]; //on given skyscraper
vector<pair<int,int>> adjlist[30000]; //weight, node
 
int n;
int sqv;
int INF = 1e9;
int distances[30000][1750];
 
int dijkstra(int startloc, int endloc){
    int start = startloc;
    for (int i = 0; i<n; i++){
        for (int j = 0; j<int(sqv)+1; j++){
            distances[i][j]=INF;
        }
    }
    distances[start][0]=0;
    priority_queue<pair<int,pair<int,int>>,vector<pair<int,pair<int,int>>>,greater<pair<int,pair<int,int>>>> pq;
    pq.push({0,{start,0}});
    while (pq.size()>0){
        auto f = pq.top();
        pq.pop();
        if (distances[f.second.first][f.second.second]<f.first){
            continue;
        }
        int curdist = f.first;
        int curnode = f.second.first;
        int curind = f.second.second;
        if (curind==0){
            // we can go to a doge with cost 0
            for (int i : smallpowers[curnode]){
                if (distances[curnode][i]>curdist){
                    distances[curnode][i]=curdist;
                    pq.push({distances[curnode][i],{curnode,i}});
                }
            }
            // or we can jump skyscrapers
            for (auto p : adjlist[curnode]){
                if (distances[p.second][0]>curdist+p.first){
                    distances[p.second][0]=curdist+p.first;
                    pq.push({distances[p.second][0],{p.second,0}});
                }
            }
        } else {
            //we can go to central node with cost 0
            if (distances[curnode][0]>curdist){
                distances[curnode][0]=curdist;
                pq.push({distances[curnode][0],{curnode,0}});
            }
            //or we can go to an adjacent node
            if (curnode-curind>=0&&distances[curnode-curind][curind]>curdist+1){
                distances[curnode-curind][curind]=curdist+1;
                pq.push({distances[curnode-curind][curind],{curnode-curind,curind}});
            }
            if (curnode+curind<n&&distances[curnode+curind][curind]>curdist+1){
                distances[curnode+curind][curind]=curdist+1;
                pq.push({distances[curnode+curind][curind],{curnode+curind,curind}});
            }
        }
    }
    return distances[endloc][0];
}
 
int main(){
    cin.tie(0);
    ios_base::sync_with_stdio(0);
    int m;
    cin>>n>>m;
    sqv = sqrt(n);
    //smallpowers.resize(n);
    //adjlist.resize(n);
    int startloc = 0;
    int endloc = 0;
    for (int i = 0; i<m; i++){
        int b,p;
        cin>>b>>p;
        if (i==0){
            startloc=b;
        } 
        if (i==1){
            endloc=b;
        }
        //skyscraper b, moves p
        if (p<sqv){
            smallpowers[b].push_back(p);
        } else {
            int cnt = 0;
            for (int x = b+p; x<n; x+=p){
                cnt++;
                adjlist[b].push_back({cnt,x});
            } 
            cnt = 0;
            for (int x = b-p; x>=0; x-=p){
                cnt++;
                adjlist[b].push_back({cnt,x});
            }
        }
    }
    int d = dijkstra(startloc,endloc);
    if (d==INF){
        cout<<-1<<'\n';
    } else {
        cout<<d<<'\n';
    }
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1792 KB Output is correct
2 Correct 1 ms 1792 KB Output is correct
3 Correct 1 ms 1792 KB Output is correct
4 Correct 1 ms 1792 KB Output is correct
5 Correct 1 ms 1792 KB Output is correct
6 Correct 1 ms 1792 KB Output is correct
7 Correct 1 ms 1792 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1792 KB Output is correct
2 Correct 1 ms 1792 KB Output is correct
3 Correct 1 ms 1792 KB Output is correct
4 Correct 1 ms 1792 KB Output is correct
5 Correct 1 ms 1792 KB Output is correct
6 Correct 1 ms 1792 KB Output is correct
7 Correct 1 ms 1792 KB Output is correct
8 Correct 1 ms 1920 KB Output is correct
9 Correct 1 ms 1920 KB Output is correct
10 Correct 2 ms 2176 KB Output is correct
11 Correct 2 ms 2176 KB Output is correct
12 Correct 2 ms 2176 KB Output is correct
13 Correct 1 ms 2176 KB Output is correct
14 Correct 2 ms 2176 KB Output is correct
15 Correct 2 ms 2176 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1792 KB Output is correct
2 Correct 1 ms 1792 KB Output is correct
3 Correct 2 ms 1792 KB Output is correct
4 Correct 1 ms 1792 KB Output is correct
5 Correct 1 ms 1792 KB Output is correct
6 Correct 2 ms 1792 KB Output is correct
7 Correct 1 ms 1792 KB Output is correct
8 Correct 1 ms 1920 KB Output is correct
9 Correct 1 ms 2048 KB Output is correct
10 Correct 1 ms 2176 KB Output is correct
11 Correct 2 ms 2176 KB Output is correct
12 Correct 2 ms 2176 KB Output is correct
13 Correct 2 ms 2176 KB Output is correct
14 Correct 2 ms 2176 KB Output is correct
15 Correct 2 ms 2176 KB Output is correct
16 Correct 2 ms 2560 KB Output is correct
17 Correct 4 ms 4864 KB Output is correct
18 Correct 5 ms 9088 KB Output is correct
19 Correct 6 ms 10112 KB Output is correct
20 Correct 6 ms 10240 KB Output is correct
21 Correct 2 ms 3328 KB Output is correct
22 Correct 5 ms 9216 KB Output is correct
23 Correct 5 ms 8448 KB Output is correct
24 Correct 6 ms 9728 KB Output is correct
25 Correct 7 ms 10112 KB Output is correct
26 Correct 6 ms 10112 KB Output is correct
27 Correct 7 ms 10112 KB Output is correct
28 Correct 6 ms 10240 KB Output is correct
29 Correct 12 ms 10112 KB Output is correct
30 Correct 7 ms 10112 KB Output is correct
31 Correct 9 ms 10240 KB Output is correct
32 Correct 7 ms 10368 KB Output is correct
33 Correct 25 ms 10752 KB Output is correct
34 Correct 18 ms 10752 KB Output is correct

Subtask #4
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1792 KB Output is correct
2 Correct 1 ms 1792 KB Output is correct
3 Correct 2 ms 1792 KB Output is correct
4 Correct 1 ms 1792 KB Output is correct
5 Correct 1 ms 1792 KB Output is correct
6 Correct 1 ms 1792 KB Output is correct
7 Correct 1 ms 1792 KB Output is correct
8 Correct 1 ms 1920 KB Output is correct
9 Correct 1 ms 2048 KB Output is correct
10 Correct 1 ms 2176 KB Output is correct
11 Correct 2 ms 2176 KB Output is correct
12 Correct 2 ms 2176 KB Output is correct
13 Correct 2 ms 2176 KB Output is correct
14 Correct 3 ms 2176 KB Output is correct
15 Correct 2 ms 2176 KB Output is correct
16 Correct 2 ms 2560 KB Output is correct
17 Correct 4 ms 4864 KB Output is correct
18 Correct 5 ms 9088 KB Output is correct
19 Correct 5 ms 10112 KB Output is correct
20 Correct 6 ms 10240 KB Output is correct
21 Correct 3 ms 3328 KB Output is correct
22 Correct 5 ms 9216 KB Output is correct
23 Correct 5 ms 8448 KB Output is correct
24 Correct 6 ms 9728 KB Output is correct
25 Correct 6 ms 10112 KB Output is correct
26 Correct 6 ms 10112 KB Output is correct
27 Correct 6 ms 10112 KB Output is correct
28 Correct 6 ms 10240 KB Output is correct
29 Correct 13 ms 10112 KB Output is correct
30 Correct 7 ms 10112 KB Output is correct
31 Correct 10 ms 10240 KB Output is correct
32 Correct 10 ms 10368 KB Output is correct
33 Correct 17 ms 10752 KB Output is correct
34 Correct 25 ms 10752 KB Output is correct
35 Correct 16 ms 8448 KB Output is correct
36 Correct 5 ms 6400 KB Output is correct
37 Correct 20 ms 11264 KB Output is correct
38 Correct 21 ms 11264 KB Output is correct
39 Correct 21 ms 11264 KB Output is correct
40 Correct 21 ms 11264 KB Output is correct
41 Correct 22 ms 11392 KB Output is correct
42 Correct 10 ms 10368 KB Output is correct
43 Correct 11 ms 10368 KB Output is correct
44 Correct 10 ms 10368 KB Output is correct
45 Correct 28 ms 14204 KB Output is correct
46 Correct 27 ms 14336 KB Output is correct

Subtask #5
43.0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1792 KB Output is correct
2 Correct 1 ms 1792 KB Output is correct
3 Correct 1 ms 1792 KB Output is correct
4 Correct 1 ms 1792 KB Output is correct
5 Correct 1 ms 1792 KB Output is correct
6 Correct 1 ms 1792 KB Output is correct
7 Correct 1 ms 1792 KB Output is correct
8 Correct 1 ms 1920 KB Output is correct
9 Correct 2 ms 1920 KB Output is correct
10 Correct 1 ms 2176 KB Output is correct
11 Correct 2 ms 2176 KB Output is correct
12 Correct 2 ms 2176 KB Output is correct
13 Correct 2 ms 2176 KB Output is correct
14 Correct 2 ms 2176 KB Output is correct
15 Correct 2 ms 2176 KB Output is correct
16 Correct 2 ms 2560 KB Output is correct
17 Correct 4 ms 4864 KB Output is correct
18 Correct 5 ms 9088 KB Output is correct
19 Correct 5 ms 10112 KB Output is correct
20 Correct 6 ms 10112 KB Output is correct
21 Correct 2 ms 3328 KB Output is correct
22 Correct 5 ms 9216 KB Output is correct
23 Correct 5 ms 8448 KB Output is correct
24 Correct 7 ms 9728 KB Output is correct
25 Correct 6 ms 10112 KB Output is correct
26 Correct 6 ms 10112 KB Output is correct
27 Correct 6 ms 10112 KB Output is correct
28 Correct 6 ms 10240 KB Output is correct
29 Correct 12 ms 10112 KB Output is correct
30 Correct 7 ms 10112 KB Output is correct
31 Correct 10 ms 10240 KB Output is correct
32 Correct 7 ms 10368 KB Output is correct
33 Correct 17 ms 10752 KB Output is correct
34 Correct 18 ms 10752 KB Output is correct
35 Correct 14 ms 8448 KB Output is correct
36 Correct 5 ms 6400 KB Output is correct
37 Correct 20 ms 11264 KB Output is correct
38 Correct 21 ms 11264 KB Output is correct
39 Correct 23 ms 11264 KB Output is correct
40 Correct 21 ms 11264 KB Output is correct
41 Correct 21 ms 11392 KB Output is correct
42 Correct 11 ms 10368 KB Output is correct
43 Correct 11 ms 10368 KB Output is correct
44 Correct 11 ms 10368 KB Output is correct
45 Correct 28 ms 14208 KB Output is correct
46 Correct 28 ms 14336 KB Output is correct
47 Correct 123 ms 61496 KB Output is correct
48 Correct 63 ms 109816 KB Output is correct
49 Correct 66 ms 120184 KB Output is correct
50 Correct 70 ms 132600 KB Output is correct
51 Correct 126 ms 144444 KB Output is correct
52 Correct 131 ms 144440 KB Output is correct
53 Correct 80 ms 142456 KB Output is correct
54 Correct 72 ms 142328 KB Output is correct
55 Correct 66 ms 142332 KB Output is correct
56 Correct 80 ms 143224 KB Output is correct
57 Correct 155 ms 142328 KB Output is correct
58 Correct 75 ms 142584 KB Output is correct
59 Correct 86 ms 142584 KB Output is correct
60 Correct 86 ms 142840 KB Output is correct
61 Correct 77 ms 142792 KB Output is correct
62 Correct 107 ms 144632 KB Output is correct
63 Correct 161 ms 167216 KB Output is correct
64 Correct 177 ms 175348 KB Output is correct
65 Correct 429 ms 174128 KB Output is correct
66 Correct 989 ms 170028 KB Output is correct
67 Correct 974 ms 169900 KB Output is correct