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Submission #250964

# Submission time Handle Problem Language Result Execution time Memory
250964 2020-07-19T17:02:41 Z eohomegrownapps Jakarta Skyscrapers (APIO15_skyscraper) C++14
36 / 100
 1000 ms 4608 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 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(sqrt(n))+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;
    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;
    int sqrtv = 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<sqrtv){
            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 2 ms 1792 KB Output is correct
6 Correct 1 ms 1792 KB Output is correct
7 Correct 2 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 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 3 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 3 ms 1920 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1792 KB Output is correct
2 Correct 2 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 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 4 ms 1920 KB Output is correct
12 Correct 2 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 3 ms 1920 KB Output is correct
16 Correct 1 ms 1920 KB Output is correct
17 Correct 113 ms 2428 KB Output is correct
18 Correct 3 ms 2944 KB Output is correct
19 Correct 3 ms 3200 KB Output is correct
20 Correct 4 ms 3200 KB Output is correct
21 Correct 1 ms 2048 KB Output is correct
22 Correct 3 ms 2944 KB Output is correct
23 Correct 13 ms 2944 KB Output is correct
24 Correct 91 ms 3200 KB Output is correct
25 Correct 11 ms 3200 KB Output is correct
26 Correct 5 ms 3200 KB Output is correct
27 Correct 4 ms 3200 KB Output is correct
28 Correct 4 ms 3292 KB Output is correct
29 Correct 6 ms 3072 KB Output is correct
30 Correct 5 ms 3072 KB Output is correct
31 Correct 4 ms 3200 KB Output is correct
32 Correct 4 ms 3328 KB Output is correct
33 Correct 9 ms 3584 KB Output is correct
34 Correct 22 ms 3584 KB Output is correct

Subtask #4
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 1 ms 1792 KB Output is correct
4 Correct 1 ms 1792 KB Output is correct
5 Correct 2 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 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 1 ms 1792 KB Output is correct
13 Correct 2 ms 1792 KB Output is correct
14 Correct 1 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 107 ms 2424 KB Output is correct
18 Correct 3 ms 2944 KB Output is correct
19 Correct 3 ms 3200 KB Output is correct
20 Correct 4 ms 3200 KB Output is correct
21 Correct 1 ms 2048 KB Output is correct
22 Correct 3 ms 2944 KB Output is correct
23 Correct 12 ms 2944 KB Output is correct
24 Correct 86 ms 3200 KB Output is correct
25 Correct 10 ms 3200 KB Output is correct
26 Correct 4 ms 3200 KB Output is correct
27 Correct 4 ms 3200 KB Output is correct
28 Correct 4 ms 3200 KB Output is correct
29 Correct 6 ms 3072 KB Output is correct
30 Correct 4 ms 3072 KB Output is correct
31 Correct 5 ms 3200 KB Output is correct
32 Correct 4 ms 3328 KB Output is correct
33 Correct 8 ms 3584 KB Output is correct
34 Correct 23 ms 3584 KB Output is correct
35 Execution timed out 1018 ms 3576 KB Time limit exceeded
36 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# 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 2 ms 1792 KB Output is correct
5 Correct 2 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 1792 KB Output is correct
9 Correct 5 ms 1792 KB Output is correct
10 Correct 2 ms 1792 KB Output is correct
11 Correct 3 ms 1920 KB Output is correct
12 Correct 2 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
16 Correct 1 ms 1920 KB Output is correct
17 Correct 110 ms 2304 KB Output is correct
18 Correct 3 ms 2944 KB Output is correct
19 Correct 3 ms 3200 KB Output is correct
20 Correct 4 ms 3200 KB Output is correct
21 Correct 2 ms 2048 KB Output is correct
22 Correct 3 ms 2944 KB Output is correct
23 Correct 13 ms 2944 KB Output is correct
24 Correct 82 ms 3200 KB Output is correct
25 Correct 11 ms 3200 KB Output is correct
26 Correct 5 ms 3200 KB Output is correct
27 Correct 4 ms 3200 KB Output is correct
28 Correct 4 ms 3200 KB Output is correct
29 Correct 7 ms 3072 KB Output is correct
30 Correct 4 ms 3072 KB Output is correct
31 Correct 5 ms 3200 KB Output is correct
32 Correct 5 ms 3328 KB Output is correct
33 Correct 8 ms 3584 KB Output is correct
34 Correct 24 ms 3584 KB Output is correct
35 Correct 995 ms 3576 KB Output is correct
36 Correct 131 ms 2688 KB Output is correct
37 Execution timed out 1090 ms 4608 KB Time limit exceeded
38 Halted 0 ms 0 KB -