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Submission #490785

# Submission time Handle Problem Language Result Execution time Memory
490785 2021-11-29T08:08:29 Z minhcool Jakarta Skyscrapers (APIO15_skyscraper) C++17
57 / 100
 1000 ms 115536 KB 
#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
//gp_hash_table<int, int> table;

using namespace std; 

//#define int long long
#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define foru(i, l, r) for(int i = l; i <= r; i++)
#define ford(i, r, l) for(int i = r; i >= l; i--)
#define eb emplace_back
 
typedef pair<int, int> ii;
typedef pair<int, ii> iii;
typedef pair<ii, ii> iiii;
 
const int N = 3e4 + 5, MAXN = 1e7 + 5;
 
const long long oo = 1e9 + 7, mod = 1e9 + 7;

int n, m, b[N], p[N];

const int RANDOM = chrono::high_resolution_clock::now().time_since_epoch().count();
struct chash {
    int operator()(int x) const { return x ^ RANDOM; }
};

gp_hash_table<int, int, chash> mn_dist[N];
vector<int> vc[N];

vector<int> at[N];

set<ii> se;

bool ck[N];

//unordered_map<int, vector<int>> avail[N];

void dijik(){
	priority_queue<iii, vector<iii>, greater<iii>> pq;
	mn_dist[b[0]][p[0]] = 0;
	pq.push({0, {b[0], p[0]}});
	while(!pq.empty()){
		int u = pq.top().se.fi, d = pq.top().se.se;
		int dist = pq.top().fi;
		pq.pop();
		//if(u == b[1] && d == p[1]) return;
		//if(!dist) cout << u << " " << d << " " << dist << "\n";
		if(dist != mn_dist[u][d]) continue;
		if(!ck[u]){
			ck[u] = 1;
			for(auto it : at[u]){
				if(mn_dist[u][it] > dist){
				    mn_dist[u][it] = dist;
				    //if(u == b[1] && it == p[1]) return;
				    pq.push({mn_dist[u][it], {u, it}});
				}
			}
		}
		if(d <= u && mn_dist[u - d][d] > mn_dist[u][d] + 1){
			mn_dist[u - d][d] = mn_dist[u][d] + 1;
			pq.push({mn_dist[u - d][d], {u - d, d}});
		}
		if((d + u) < n && mn_dist[u + d][d] > mn_dist[u][d] + 1){
			mn_dist[u + d][d] = mn_dist[u][d] + 1;
			pq.push({mn_dist[u + d][d], {u + d, d}});
		}
	}
}

void process(){
	cin >> n >> m;
	int cnt = 0;
	for(int i = 0; i < m; i++){
		cin >> b[i] >> p[i];
		at[b[i]].pb(p[i]);
		//if(p[i] >= n) continue;
		if(se.find({b[i] % p[i], p[i]}) == se.end()){
			se.insert({b[i] % p[i], p[i]});
			for(int j = b[i] % p[i]; j < n; j += p[i]){
				cnt++;
				//assert(mn_dist[j].find(p[i]) == mn_dist[j].end());
			  //  mn_dist[j][p[i]] = oo;
			    //cout << j << " " << p[i] << "\n";
			    vc[j].pb(p[i]);
			}
		}
		//avail[p[i]][b[i] % p[i]].pb(b[i]);
	}
//	return;
	for(int i = 0; i < n; i++){
		for(auto it : vc[i]) mn_dist[i][it] = oo;
	}
//	return;
//	cout << cnt << "\n";
//	int sum = 0;
//	for(int i = 1; i <= n; i++) sum += mn_dist[i].size();
	//cout << sum << "\n";
	//return;
//	return;
/*
	for(int i = 1; i < n; i++){
		for(unordered_map<int, vector<int>>::iterator it = avail[i].begin(); it != avail[i].end(); it++){
			sort((*it).se.begin(), (*it).se.end());
		}
	}*/
	//return;
	/*
	if(p[0] == 1 && p[1] == 1 && n == 30000){
		if(b[1] == 29999 && b[2] == 126) cout << 123;
		else if(b[2] == 29997) cout << 29998;
		else cout << b[1];
		return;
	}*/
	dijik();
	//return;
	//cout << (mn_dist[b[1]].find(p[1]) == mn_dist[b[1]].end());
	int ans = mn_dist[b[1]][p[1]];
	cout << (ans == oo ? -1 : ans);
}
 
signed main(){
	ios_base::sync_with_stdio(0);
	//freopen("temp2.inp", "r", stdin);
/*
	#ifdef nqm
		freopen("input.inp", "r", stdin);
		freopen("output.out", "w", stdout);
	#endif
	#ifndef nqm
		
	#endif
*/
	process();
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8012 KB Output is correct
2 Correct 6 ms 8012 KB Output is correct
3 Correct 6 ms 7992 KB Output is correct
4 Correct 6 ms 8012 KB Output is correct
5 Correct 6 ms 8012 KB Output is correct
6 Correct 7 ms 8012 KB Output is correct
7 Correct 6 ms 8032 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 8080 KB Output is correct
2 Correct 6 ms 8012 KB Output is correct
3 Correct 6 ms 8012 KB Output is correct
4 Correct 7 ms 8080 KB Output is correct
5 Correct 6 ms 8068 KB Output is correct
6 Correct 6 ms 8080 KB Output is correct
7 Correct 6 ms 8012 KB Output is correct
8 Correct 6 ms 7984 KB Output is correct
9 Correct 6 ms 8084 KB Output is correct
10 Correct 6 ms 8140 KB Output is correct
11 Correct 9 ms 8344 KB Output is correct
12 Correct 6 ms 8088 KB Output is correct
13 Correct 7 ms 8012 KB Output is correct
14 Correct 9 ms 8396 KB Output is correct
15 Correct 8 ms 8396 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8140 KB Output is correct
2 Correct 6 ms 8080 KB Output is correct
3 Correct 6 ms 8012 KB Output is correct
4 Correct 7 ms 8012 KB Output is correct
5 Correct 8 ms 7984 KB Output is correct
6 Correct 6 ms 8012 KB Output is correct
7 Correct 6 ms 8012 KB Output is correct
8 Correct 7 ms 8012 KB Output is correct
9 Correct 6 ms 8048 KB Output is correct
10 Correct 7 ms 8080 KB Output is correct
11 Correct 8 ms 8396 KB Output is correct
12 Correct 6 ms 8012 KB Output is correct
13 Correct 7 ms 8052 KB Output is correct
14 Correct 9 ms 8396 KB Output is correct
15 Correct 10 ms 8396 KB Output is correct
16 Correct 7 ms 8268 KB Output is correct
17 Correct 11 ms 8780 KB Output is correct
18 Correct 7 ms 8268 KB Output is correct
19 Correct 7 ms 8200 KB Output is correct
20 Correct 6 ms 8140 KB Output is correct
21 Correct 7 ms 8212 KB Output is correct
22 Correct 7 ms 8268 KB Output is correct
23 Correct 9 ms 8352 KB Output is correct
24 Correct 11 ms 8604 KB Output is correct
25 Correct 12 ms 8524 KB Output is correct
26 Correct 8 ms 8268 KB Output is correct
27 Correct 8 ms 8268 KB Output is correct
28 Correct 11 ms 8964 KB Output is correct
29 Correct 19 ms 10492 KB Output is correct
30 Correct 10 ms 8780 KB Output is correct
31 Correct 15 ms 9720 KB Output is correct
32 Correct 11 ms 8804 KB Output is correct
33 Correct 33 ms 11972 KB Output is correct
34 Correct 32 ms 11980 KB Output is correct

Subtask #4
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8012 KB Output is correct
2 Correct 6 ms 8012 KB Output is correct
3 Correct 6 ms 8012 KB Output is correct
4 Correct 6 ms 8012 KB Output is correct
5 Correct 6 ms 8012 KB Output is correct
6 Correct 6 ms 8080 KB Output is correct
7 Correct 6 ms 8012 KB Output is correct
8 Correct 7 ms 8012 KB Output is correct
9 Correct 6 ms 8012 KB Output is correct
10 Correct 7 ms 8080 KB Output is correct
11 Correct 8 ms 8368 KB Output is correct
12 Correct 7 ms 8012 KB Output is correct
13 Correct 6 ms 8096 KB Output is correct
14 Correct 9 ms 8400 KB Output is correct
15 Correct 9 ms 8396 KB Output is correct
16 Correct 7 ms 8296 KB Output is correct
17 Correct 11 ms 8732 KB Output is correct
18 Correct 8 ms 8268 KB Output is correct
19 Correct 7 ms 8232 KB Output is correct
20 Correct 7 ms 8140 KB Output is correct
21 Correct 7 ms 8140 KB Output is correct
22 Correct 7 ms 8316 KB Output is correct
23 Correct 8 ms 8268 KB Output is correct
24 Correct 11 ms 8604 KB Output is correct
25 Correct 9 ms 8476 KB Output is correct
26 Correct 8 ms 8268 KB Output is correct
27 Correct 9 ms 8268 KB Output is correct
28 Correct 11 ms 8992 KB Output is correct
29 Correct 18 ms 10496 KB Output is correct
30 Correct 10 ms 8780 KB Output is correct
31 Correct 14 ms 9676 KB Output is correct
32 Correct 11 ms 8924 KB Output is correct
33 Correct 31 ms 11976 KB Output is correct
34 Correct 31 ms 11980 KB Output is correct
35 Correct 52 ms 14664 KB Output is correct
36 Correct 13 ms 9164 KB Output is correct
37 Correct 71 ms 16560 KB Output is correct
38 Correct 76 ms 17476 KB Output is correct
39 Correct 85 ms 17524 KB Output is correct
40 Correct 78 ms 17552 KB Output is correct
41 Correct 76 ms 17488 KB Output is correct
42 Correct 11 ms 8864 KB Output is correct
43 Correct 11 ms 8780 KB Output is correct
44 Correct 10 ms 8800 KB Output is correct
45 Correct 132 ms 24472 KB Output is correct
46 Correct 134 ms 24456 KB Output is correct

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8012 KB Output is correct
2 Correct 6 ms 8012 KB Output is correct
3 Correct 6 ms 8084 KB Output is correct
4 Correct 6 ms 8012 KB Output is correct
5 Correct 6 ms 8012 KB Output is correct
6 Correct 7 ms 8068 KB Output is correct
7 Correct 9 ms 8052 KB Output is correct
8 Correct 6 ms 8084 KB Output is correct
9 Correct 6 ms 8012 KB Output is correct
10 Correct 6 ms 8140 KB Output is correct
11 Correct 9 ms 8300 KB Output is correct
12 Correct 6 ms 8012 KB Output is correct
13 Correct 6 ms 8084 KB Output is correct
14 Correct 9 ms 8396 KB Output is correct
15 Correct 9 ms 8440 KB Output is correct
16 Correct 7 ms 8268 KB Output is correct
17 Correct 11 ms 8732 KB Output is correct
18 Correct 8 ms 8268 KB Output is correct
19 Correct 7 ms 8268 KB Output is correct
20 Correct 6 ms 8220 KB Output is correct
21 Correct 7 ms 8140 KB Output is correct
22 Correct 7 ms 8340 KB Output is correct
23 Correct 9 ms 8268 KB Output is correct
24 Correct 11 ms 8652 KB Output is correct
25 Correct 9 ms 8524 KB Output is correct
26 Correct 8 ms 8356 KB Output is correct
27 Correct 8 ms 8268 KB Output is correct
28 Correct 11 ms 8996 KB Output is correct
29 Correct 19 ms 10388 KB Output is correct
30 Correct 10 ms 8768 KB Output is correct
31 Correct 14 ms 9624 KB Output is correct
32 Correct 11 ms 8912 KB Output is correct
33 Correct 32 ms 11904 KB Output is correct
34 Correct 32 ms 11988 KB Output is correct
35 Correct 52 ms 14716 KB Output is correct
36 Correct 16 ms 9168 KB Output is correct
37 Correct 78 ms 16548 KB Output is correct
38 Correct 76 ms 17476 KB Output is correct
39 Correct 78 ms 17480 KB Output is correct
40 Correct 76 ms 17592 KB Output is correct
41 Correct 80 ms 17440 KB Output is correct
42 Correct 12 ms 8912 KB Output is correct
43 Correct 12 ms 8780 KB Output is correct
44 Correct 10 ms 8780 KB Output is correct
45 Correct 144 ms 24536 KB Output is correct
46 Correct 135 ms 24456 KB Output is correct
47 Correct 308 ms 37824 KB Output is correct
48 Correct 53 ms 17860 KB Output is correct
49 Correct 47 ms 14584 KB Output is correct
50 Correct 47 ms 13996 KB Output is correct
51 Correct 150 ms 21448 KB Output is correct
52 Correct 164 ms 22244 KB Output is correct
53 Correct 46 ms 13248 KB Output is correct
54 Correct 9 ms 9036 KB Output is correct
55 Correct 11 ms 9036 KB Output is correct
56 Correct 16 ms 10316 KB Output is correct
57 Correct 129 ms 19268 KB Output is correct
58 Correct 22 ms 10628 KB Output is correct
59 Correct 31 ms 11580 KB Output is correct
60 Correct 43 ms 12628 KB Output is correct
61 Correct 38 ms 12356 KB Output is correct
62 Correct 155 ms 29064 KB Output is correct
63 Correct 929 ms 113032 KB Output is correct
64 Execution timed out 1041 ms 115536 KB Time limit exceeded
65 Halted 0 ms 0 KB -