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Submission #250977

# Submission time Handle Problem Language Result Execution time Memory
250977 2020-07-19T17:14:31 Z eohomegrownapps Jakarta Skyscrapers (APIO15_skyscraper) C++14
100 / 100
 950 ms 56876 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][175];

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>>>,less<pair<int,pair<int,int>>>> pq;
    set<pair<int,pair<int,int>>> pq;
    pq.insert({0,{start,0}});
    while (pq.size()>0){
        //auto f = pq.top();
        //pq.pop();
        auto f = *pq.begin();
        pq.erase(pq.begin());
        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.insert({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.insert({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.insert({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.insert({distances[curnode-curind][curind],{curnode-curind,curind}});
            }
            if (curnode+curind<n&&distances[curnode+curind][curind]>curdist+1){
                distances[curnode+curind][curind]=curdist+1;
                pq.insert({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 2 ms 1792 KB Output is correct
4 Correct 2 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 2 ms 1792 KB Output is correct
9 Correct 1 ms 1792 KB Output is correct
10 Correct 1 ms 1792 KB Output is correct
11 Correct 2 ms 1920 KB Output is correct
12 Correct 1 ms 1792 KB Output is correct
13 Correct 2 ms 1792 KB Output is correct
14 Correct 2 ms 1920 KB Output is correct
15 Correct 2 ms 1920 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 2 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 2 ms 1792 KB Output is correct
7 Correct 1 ms 1792 KB Output is correct
8 Correct 1 ms 1792 KB Output is correct
9 Correct 1 ms 1792 KB Output is correct
10 Correct 2 ms 1792 KB Output is correct
11 Correct 2 ms 1920 KB Output is correct
12 Correct 2 ms 1792 KB Output is correct
13 Correct 1 ms 1792 KB Output is correct
14 Correct 2 ms 1920 KB Output is correct
15 Correct 2 ms 1920 KB Output is correct
16 Correct 2 ms 1920 KB Output is correct
17 Correct 5 ms 2432 KB Output is correct
18 Correct 2 ms 2944 KB Output is correct
19 Correct 2 ms 3200 KB Output is correct
20 Correct 3 ms 3200 KB Output is correct
21 Correct 1 ms 2048 KB Output is correct
22 Correct 2 ms 2944 KB Output is correct
23 Correct 3 ms 2944 KB Output is correct
24 Correct 4 ms 3200 KB Output is correct
25 Correct 3 ms 3200 KB Output is correct
26 Correct 3 ms 3200 KB Output is correct
27 Correct 3 ms 3200 KB Output is correct
28 Correct 4 ms 3200 KB Output is correct
29 Correct 12 ms 3200 KB Output is correct
30 Correct 5 ms 3072 KB Output is correct
31 Correct 8 ms 3328 KB Output is correct
32 Correct 4 ms 3456 KB Output is correct
33 Correct 17 ms 3968 KB Output is correct
34 Correct 17 ms 3968 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 2 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 2 ms 1792 KB Output is correct
9 Correct 1 ms 1792 KB Output is correct
10 Correct 1 ms 1792 KB Output is correct
11 Correct 3 ms 1920 KB Output is correct
12 Correct 1 ms 1792 KB Output is correct
13 Correct 1 ms 1792 KB Output is correct
14 Correct 2 ms 1920 KB Output is correct
15 Correct 2 ms 1920 KB Output is correct
16 Correct 1 ms 1920 KB Output is correct
17 Correct 3 ms 2560 KB Output is correct
18 Correct 2 ms 2944 KB Output is correct
19 Correct 2 ms 3200 KB Output is correct
20 Correct 2 ms 3200 KB Output is correct
21 Correct 1 ms 2048 KB Output is correct
22 Correct 2 ms 2944 KB Output is correct
23 Correct 3 ms 2944 KB Output is correct
24 Correct 5 ms 3200 KB Output is correct
25 Correct 3 ms 3200 KB Output is correct
26 Correct 4 ms 3200 KB Output is correct
27 Correct 3 ms 3200 KB Output is correct
28 Correct 4 ms 3200 KB Output is correct
29 Correct 11 ms 3200 KB Output is correct
30 Correct 5 ms 3072 KB Output is correct
31 Correct 11 ms 3328 KB Output is correct
32 Correct 7 ms 3456 KB Output is correct
33 Correct 16 ms 3968 KB Output is correct
34 Correct 17 ms 3968 KB Output is correct
35 Correct 14 ms 3456 KB Output is correct
36 Correct 5 ms 2688 KB Output is correct
37 Correct 23 ms 4736 KB Output is correct
38 Correct 23 ms 4608 KB Output is correct
39 Correct 21 ms 4608 KB Output is correct
40 Correct 22 ms 4608 KB Output is correct
41 Correct 22 ms 4608 KB Output is correct
42 Correct 8 ms 3584 KB Output is correct
43 Correct 8 ms 3584 KB Output is correct
44 Correct 7 ms 3584 KB Output is correct
45 Correct 29 ms 7288 KB Output is correct
46 Correct 26 ms 7552 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 2 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 2 ms 1792 KB Output is correct
9 Correct 2 ms 1792 KB Output is correct
10 Correct 2 ms 1792 KB Output is correct
11 Correct 2 ms 1920 KB Output is correct
12 Correct 2 ms 1792 KB Output is correct
13 Correct 1 ms 1792 KB Output is correct
14 Correct 3 ms 1920 KB Output is correct
15 Correct 2 ms 1920 KB Output is correct
16 Correct 2 ms 1920 KB Output is correct
17 Correct 3 ms 2432 KB Output is correct
18 Correct 2 ms 2944 KB Output is correct
19 Correct 2 ms 3200 KB Output is correct
20 Correct 2 ms 3200 KB Output is correct
21 Correct 2 ms 2048 KB Output is correct
22 Correct 2 ms 2944 KB Output is correct
23 Correct 3 ms 2944 KB Output is correct
24 Correct 4 ms 3200 KB Output is correct
25 Correct 3 ms 3200 KB Output is correct
26 Correct 4 ms 3200 KB Output is correct
27 Correct 2 ms 3200 KB Output is correct
28 Correct 4 ms 3200 KB Output is correct
29 Correct 11 ms 3200 KB Output is correct
30 Correct 5 ms 3072 KB Output is correct
31 Correct 7 ms 3328 KB Output is correct
32 Correct 5 ms 3456 KB Output is correct
33 Correct 17 ms 3968 KB Output is correct
34 Correct 16 ms 3968 KB Output is correct
35 Correct 16 ms 3456 KB Output is correct
36 Correct 4 ms 2688 KB Output is correct
37 Correct 19 ms 4736 KB Output is correct
38 Correct 19 ms 4608 KB Output is correct
39 Correct 20 ms 4608 KB Output is correct
40 Correct 19 ms 4608 KB Output is correct
41 Correct 19 ms 4608 KB Output is correct
42 Correct 8 ms 3584 KB Output is correct
43 Correct 7 ms 3584 KB Output is correct
44 Correct 8 ms 3584 KB Output is correct
45 Correct 25 ms 7296 KB Output is correct
46 Correct 30 ms 7680 KB Output is correct
47 Correct 103 ms 16120 KB Output is correct
48 Correct 20 ms 19064 KB Output is correct
49 Correct 20 ms 20352 KB Output is correct
50 Correct 18 ms 21760 KB Output is correct
51 Correct 86 ms 25464 KB Output is correct
52 Correct 85 ms 25592 KB Output is correct
53 Correct 28 ms 22784 KB Output is correct
54 Correct 23 ms 22272 KB Output is correct
55 Correct 17 ms 22272 KB Output is correct
56 Correct 24 ms 23424 KB Output is correct
57 Correct 98 ms 22520 KB Output is correct
58 Correct 23 ms 22656 KB Output is correct
59 Correct 28 ms 22784 KB Output is correct
60 Correct 32 ms 23040 KB Output is correct
61 Correct 29 ms 23040 KB Output is correct
62 Correct 59 ms 24952 KB Output is correct
63 Correct 126 ms 50424 KB Output is correct
64 Correct 140 ms 56056 KB Output is correct
65 Correct 399 ms 56876 KB Output is correct
66 Correct 920 ms 52344 KB Output is correct
67 Correct 950 ms 52084 KB Output is correct