Submission #249472

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
249472	2020-07-15T06:18:37 Z	AMO5	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	100 / 100	380 ms	20464 KB

skyscraper

#include <bits/stdc++.h>

using namespace std;

#define fi first
#define se second
#define eb emplace_back
#define mt make_tuple
#define all(x) (x).begin(), (x).end() 
#define sz(x) int(x.size()) 
#define MOD 1000000007

typedef long long ll;
typedef pair <int, int> ii;
typedef pair <ll, ll> pll;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef long double ld;

const ll INF=LLONG_MAX;
const int mxn=3e5+5;
bool DEBUG=0;
int n,m,start,target;
set<int>jumps[mxn];

void solve(){
	priority_queue<ii,vector<ii>,greater<ii>>pq;
	pq.push({0,start});
	vi dist(n,INT_MAX);
	while(!pq.empty()){
		ii now = pq.top();
		pq.pop();
		int cost = now.fi;
		int pos = now.se;
		if(cost>dist[pos])continue;
		dist[pos]=cost;
		if(pos==target){
			cout << cost << endl;
			return;
		}
		//to the left
		for(int jmp:jumps[pos]){
			for(int cnt=1,cur=pos-jmp; cur>=0; cur-=jmp,cnt++){
				if(dist[cur]>dist[pos]+cnt){
					dist[cur]=dist[pos]+cnt;
					pq.push({dist[cur],cur});
					if(jumps[cur].count(jmp))break;
				}
			}
		}
		// to the right
		for(int jmp:jumps[pos]){
			for(int cnt=1,cur=pos+jmp; cur<n; cur+=jmp,cnt++){
				if(dist[cur]>dist[pos]+cnt){
					dist[cur]=dist[pos]+cnt;
					pq.push({dist[cur],cur});
					if(jumps[cur].count(jmp))break;
				}
			}
		}
	}
	cout << -1 << endl;
	return;
}

int main()
{
    if(!DEBUG){ios_base::sync_with_stdio(0); cin.tie(0);}
    //freopen("input.txt","r",stdin); freopen("output.txt","w",stdout);
	cin >> n >> m;
	for(int i=0; i<m; i++){
		int pos, jmp;
		cin >> pos >> jmp;
		jumps[pos].insert(jmp);
		if(i==0)start=pos;
		if(i==1)target=pos;
	}
	solve();
}
	
// READ & UNDERSTAND
// ll, int overflow, array bounds, memset(0)
// special cases (n=1?), n+1 (1-index)
// do smth instead of nothing & stay organized
// WRITE STUFF DOWN

Subtask #1
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	8 ms	14464 KB	Output is correct
2	Correct	8 ms	14464 KB	Output is correct
3	Correct	9 ms	14464 KB	Output is correct
4	Correct	8 ms	14464 KB	Output is correct
5	Correct	8 ms	14464 KB	Output is correct
6	Correct	8 ms	14464 KB	Output is correct
7	Correct	8 ms	14464 KB	Output is correct

Subtask #2
12.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	8 ms	14464 KB	Output is correct
2	Correct	8 ms	14452 KB	Output is correct
3	Correct	8 ms	14464 KB	Output is correct
4	Correct	9 ms	14464 KB	Output is correct
5	Correct	8 ms	14464 KB	Output is correct
6	Correct	8 ms	14464 KB	Output is correct
7	Correct	8 ms	14464 KB	Output is correct
8	Correct	8 ms	14464 KB	Output is correct
9	Correct	8 ms	14464 KB	Output is correct
10	Correct	9 ms	14436 KB	Output is correct
11	Correct	9 ms	14464 KB	Output is correct
12	Correct	8 ms	14464 KB	Output is correct
13	Correct	8 ms	14464 KB	Output is correct
14	Correct	12 ms	14592 KB	Output is correct
15	Correct	9 ms	14592 KB	Output is correct

Subtask #3
14.0 / 14.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	11 ms	14464 KB	Output is correct
2	Correct	8 ms	14464 KB	Output is correct
3	Correct	8 ms	14464 KB	Output is correct
4	Correct	8 ms	14464 KB	Output is correct
5	Correct	8 ms	14464 KB	Output is correct
6	Correct	8 ms	14464 KB	Output is correct
7	Correct	8 ms	14464 KB	Output is correct
8	Correct	8 ms	14464 KB	Output is correct
9	Correct	8 ms	14464 KB	Output is correct
10	Correct	8 ms	14464 KB	Output is correct
11	Correct	9 ms	14464 KB	Output is correct
12	Correct	9 ms	14464 KB	Output is correct
13	Correct	8 ms	14464 KB	Output is correct
14	Correct	9 ms	14592 KB	Output is correct
15	Correct	9 ms	14592 KB	Output is correct
16	Correct	8 ms	14464 KB	Output is correct
17	Correct	9 ms	14592 KB	Output is correct
18	Correct	8 ms	14464 KB	Output is correct
19	Correct	8 ms	14464 KB	Output is correct
20	Correct	10 ms	14592 KB	Output is correct
21	Correct	9 ms	14464 KB	Output is correct
22	Correct	9 ms	14464 KB	Output is correct
23	Correct	9 ms	14464 KB	Output is correct
24	Correct	9 ms	14592 KB	Output is correct
25	Correct	9 ms	14592 KB	Output is correct
26	Correct	9 ms	14464 KB	Output is correct
27	Correct	9 ms	14464 KB	Output is correct
28	Correct	9 ms	14592 KB	Output is correct
29	Correct	11 ms	14720 KB	Output is correct
30	Correct	9 ms	14592 KB	Output is correct
31	Correct	10 ms	14592 KB	Output is correct
32	Correct	9 ms	14592 KB	Output is correct
33	Correct	11 ms	14976 KB	Output is correct
34	Correct	11 ms	14976 KB	Output is correct

Subtask #4
21.0 / 21.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	9 ms	14464 KB	Output is correct
2	Correct	9 ms	14464 KB	Output is correct
3	Correct	8 ms	14464 KB	Output is correct
4	Correct	8 ms	14464 KB	Output is correct
5	Correct	8 ms	14464 KB	Output is correct
6	Correct	8 ms	14464 KB	Output is correct
7	Correct	9 ms	14464 KB	Output is correct
8	Correct	8 ms	14464 KB	Output is correct
9	Correct	9 ms	14464 KB	Output is correct
10	Correct	8 ms	14464 KB	Output is correct
11	Correct	10 ms	14464 KB	Output is correct
12	Correct	8 ms	14464 KB	Output is correct
13	Correct	8 ms	14464 KB	Output is correct
14	Correct	8 ms	14592 KB	Output is correct
15	Correct	9 ms	14592 KB	Output is correct
16	Correct	9 ms	14464 KB	Output is correct
17	Correct	9 ms	14592 KB	Output is correct
18	Correct	8 ms	14464 KB	Output is correct
19	Correct	8 ms	14464 KB	Output is correct
20	Correct	10 ms	14592 KB	Output is correct
21	Correct	8 ms	14464 KB	Output is correct
22	Correct	9 ms	14464 KB	Output is correct
23	Correct	9 ms	14464 KB	Output is correct
24	Correct	9 ms	14592 KB	Output is correct
25	Correct	9 ms	14592 KB	Output is correct
26	Correct	9 ms	14464 KB	Output is correct
27	Correct	9 ms	14464 KB	Output is correct
28	Correct	9 ms	14592 KB	Output is correct
29	Correct	10 ms	14720 KB	Output is correct
30	Correct	12 ms	14592 KB	Output is correct
31	Correct	9 ms	14624 KB	Output is correct
32	Correct	10 ms	14592 KB	Output is correct
33	Correct	12 ms	14976 KB	Output is correct
34	Correct	11 ms	14976 KB	Output is correct
35	Correct	20 ms	15872 KB	Output is correct
36	Correct	10 ms	14720 KB	Output is correct
37	Correct	16 ms	15616 KB	Output is correct
38	Correct	21 ms	16256 KB	Output is correct
39	Correct	20 ms	16128 KB	Output is correct
40	Correct	20 ms	16128 KB	Output is correct
41	Correct	21 ms	16256 KB	Output is correct
42	Correct	13 ms	14720 KB	Output is correct
43	Correct	13 ms	14720 KB	Output is correct
44	Correct	15 ms	14720 KB	Output is correct
45	Correct	27 ms	16384 KB	Output is correct
46	Correct	26 ms	16384 KB	Output is correct

Subtask #5
43.0 / 43.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	9 ms	14464 KB	Output is correct
2	Correct	8 ms	14464 KB	Output is correct
3	Correct	8 ms	14464 KB	Output is correct
4	Correct	11 ms	14464 KB	Output is correct
5	Correct	8 ms	14464 KB	Output is correct
6	Correct	8 ms	14464 KB	Output is correct
7	Correct	8 ms	14464 KB	Output is correct
8	Correct	8 ms	14464 KB	Output is correct
9	Correct	8 ms	14464 KB	Output is correct
10	Correct	8 ms	14464 KB	Output is correct
11	Correct	8 ms	14464 KB	Output is correct
12	Correct	8 ms	14464 KB	Output is correct
13	Correct	9 ms	14464 KB	Output is correct
14	Correct	9 ms	14592 KB	Output is correct
15	Correct	9 ms	14592 KB	Output is correct
16	Correct	8 ms	14464 KB	Output is correct
17	Correct	9 ms	14592 KB	Output is correct
18	Correct	9 ms	14464 KB	Output is correct
19	Correct	8 ms	14464 KB	Output is correct
20	Correct	11 ms	14592 KB	Output is correct
21	Correct	9 ms	14464 KB	Output is correct
22	Correct	10 ms	14464 KB	Output is correct
23	Correct	9 ms	14464 KB	Output is correct
24	Correct	9 ms	14592 KB	Output is correct
25	Correct	9 ms	14592 KB	Output is correct
26	Correct	10 ms	14464 KB	Output is correct
27	Correct	9 ms	14464 KB	Output is correct
28	Correct	9 ms	14592 KB	Output is correct
29	Correct	11 ms	14720 KB	Output is correct
30	Correct	9 ms	14592 KB	Output is correct
31	Correct	12 ms	14592 KB	Output is correct
32	Correct	9 ms	14592 KB	Output is correct
33	Correct	12 ms	14976 KB	Output is correct
34	Correct	10 ms	14880 KB	Output is correct
35	Correct	19 ms	15872 KB	Output is correct
36	Correct	10 ms	14720 KB	Output is correct
37	Correct	17 ms	15616 KB	Output is correct
38	Correct	21 ms	16128 KB	Output is correct
39	Correct	20 ms	16128 KB	Output is correct
40	Correct	20 ms	16128 KB	Output is correct
41	Correct	22 ms	16276 KB	Output is correct
42	Correct	13 ms	14592 KB	Output is correct
43	Correct	15 ms	14720 KB	Output is correct
44	Correct	15 ms	14720 KB	Output is correct
45	Correct	26 ms	16512 KB	Output is correct
46	Correct	24 ms	16512 KB	Output is correct
47	Correct	21 ms	16508 KB	Output is correct
48	Correct	17 ms	15744 KB	Output is correct
49	Correct	18 ms	15744 KB	Output is correct
50	Correct	13 ms	15360 KB	Output is correct
51	Correct	30 ms	16892 KB	Output is correct
52	Correct	28 ms	16892 KB	Output is correct
53	Correct	21 ms	16512 KB	Output is correct
54	Correct	10 ms	14848 KB	Output is correct
55	Correct	10 ms	14856 KB	Output is correct
56	Correct	380 ms	16128 KB	Output is correct
57	Correct	11 ms	15104 KB	Output is correct
58	Correct	15 ms	14976 KB	Output is correct
59	Correct	17 ms	14976 KB	Output is correct
60	Correct	16 ms	14976 KB	Output is correct
61	Correct	17 ms	15232 KB	Output is correct
62	Correct	22 ms	16256 KB	Output is correct
63	Correct	50 ms	18420 KB	Output is correct
64	Correct	53 ms	18420 KB	Output is correct
65	Correct	60 ms	18420 KB	Output is correct
66	Correct	117 ms	20464 KB	Output is correct
67	Correct	71 ms	20456 KB	Output is correct

Submission #249472

Compilation message

Subtask #1 10.0 / 10.0

Subtask #2 12.0 / 12.0

Subtask #3 14.0 / 14.0

Subtask #4 21.0 / 21.0

Subtask #5 43.0 / 43.0

Subtask #1
10.0 / 10.0

Subtask #2
12.0 / 12.0

Subtask #3
14.0 / 14.0

Subtask #4
21.0 / 21.0

Subtask #5
43.0 / 43.0