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Submission #813461

# Submission time Handle Problem Language Result Execution time Memory
813461 2023-08-07T18:20:28 Z Juan Jakarta Skyscrapers (APIO15_skyscraper) C++17
0 / 100
 1 ms 980 KB 
#include<bits/stdc++.h>
using namespace std;
#pragma GCC optimize (03)
#define int long long
#define pb push_back
#define pii pair<int,int>
#define all(x) x.begin(),x.end()
const int maxn = 3e4 + 5, INF = 0x3f3f3f3f;

vector<int> doges[maxn];
int dist[maxn];
priority_queue<pii, vector<pii>, greater<pii>> pq;

int32_t main(){
	ios::sync_with_stdio(false); cin.tie(0);
	int n, m; cin >> n >> m;
	for(int i = 0; i < m; i++){
		int bi, pi; cin >> bi >> pi;
		doges[bi].pb(pi);
	}
	for(int i = 0; i < n; i++){
		sort(all(doges[i]));
		doges[i].erase(unique(all(doges[i])), doges[i].end());
		// cout << doges[i].size() << endl;
	}

	for(int i = 0; i < n; i++) dist[i] = INF;
	pq.push({0,0});
	dist[0] = 0;
	while(pq.size()){
		auto[d,u] = pq.top(); pq.pop();
		if(dist[u]<d) continue;
		// cout << u << ": " << dist[u] << endl;
		if(u==1) continue;

		for(int x : doges[u]){
			for(int i = u+x; i < n; i+=x){
				int wv = (i-u)/x;
				if(dist[i] > dist[u]+wv)
					dist[i] = dist[u]+wv, pq.push({dist[i], i});
			}
			for(int i = u-x; i >= 0; i-=x){
				int wv = (u-i)/x;
				if(dist[i] > dist[u]+wv)
					dist[i] = dist[u]+wv, pq.push({dist[i], i});
			}
		}
	}

	if(dist[1] == INF) cout << -1;
	else cout << dist[1];
	cout << '\n';
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 980 KB Output is correct
2 Correct 1 ms 980 KB Output is correct
3 Incorrect 1 ms 980 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 980 KB Output is correct
2 Correct 1 ms 980 KB Output is correct
3 Incorrect 1 ms 980 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 980 KB Output is correct
2 Correct 1 ms 980 KB Output is correct
3 Incorrect 1 ms 980 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 980 KB Output is correct
2 Correct 1 ms 980 KB Output is correct
3 Incorrect 1 ms 980 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 980 KB Output is correct
2 Correct 1 ms 980 KB Output is correct
3 Incorrect 1 ms 980 KB Output isn't correct
4 Halted 0 ms 0 KB -