Submission #1198476

#	Time	Username	Problem	Language	Result	Execution time	Memory
1198476		PlayVoltz	Jakarta Skyscrapers (APIO15_skyscraper)	C++20	100 / 100	44 ms	7564 KiB

skyscraper

#include <iostream>
#include <map>
#include <vector>
#include <climits>
#include <stack>
#include <string>
#include <queue>
#include <algorithm>
#include <set>
#include <unordered_set>
#include <iostream>
#include <unordered_map>
#include <cmath>
#include <cctype>
#include <bitset>
#include <iomanip>
#include <cstring>
using namespace std;

#define int long long
#define pii pair<int, int>
#define mp make_pair
#define pb push_back
#define fi first
#define se second

int n, dj[30005];
vector<int> graph[30005];
bool have[30005][185];

int dijk(int start, int end){
	for (int i=0; i<n; ++i)dj[i]=LLONG_MAX/2;
	priority_queue<pii, vector<pii>, greater<pii> > pq;
	dj[start]=0;
	pq.push(mp(0, start));
	while (!pq.empty()){
		int d=pq.top().fi, cnode = pq.top().se;
		pq.pop();
		if (d>dj[cnode])continue;
		for (auto num:graph[cnode]){
			for (int i=1; cnode+i*num<n; ++i){
				if (dj[cnode]+i<dj[cnode+i*num]){
					dj[cnode+i*num]=dj[cnode]+i;
					pq.push(mp(dj[cnode+i*num], cnode+i*num));
				}
				if (num<180&&have[cnode+i*num][num])break;
			}
			for (int i=1; cnode-i*num>=0; ++i){
				if (dj[cnode]+i<dj[cnode-i*num]){
					dj[cnode-i*num]=dj[cnode]+i;
					pq.push(mp(dj[cnode-i*num], cnode-i*num));
				}
				if (num<180&&have[cnode-i*num][num])break;
			}
		}
	}
	return (dj[end]==LLONG_MAX/2?-1:dj[end]);
}

int32_t main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	int m, start, end, a, b;
	cin>>n>>m;
	for (int i=0; i<m; ++i){
		cin>>a>>b;
		if (!i)start=a;
		else if (i==1)end=a;
		if (b>=180||!have[a][b])graph[a].pb(b);
		if (b<180)have[a][b]=1;
	}
	cout<<dijk(start, end);
}

• Subtask 1: 10 / 10
• Subtask 2: 12 / 12
• Subtask 3: 14 / 14
• Subtask 4: 21 / 21
• Subtask 5: 43 / 43