Submission #409364

#	Time	Username	Problem	Language	Result	Execution time	Memory
409364		victoriad	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	0 / 100	1087 ms	204 KiB

skyscraper

#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#include <utility>
#include <queue>
#include <map>
#include <iomanip>
#include <stack>
#include <fstream>
using namespace std;
 
 int menor(vector<vector<int> >&mov,int z,int u){
	 int n=mov.size();
	 vector<int>d(n,1e9);
	 priority_queue<pair<int,int >  >pq;
	pq.push(make_pair(0,z));
	d[z]=0;
	while(!pq.empty()){
		int t=pq.top().first;
		t*=-1;
		int nt=pq.top().second;
		if(t>=d[u])break;
		pq.pop();
		if(t>d[nt])continue;
		if(nt!=u){
		for(int c:mov[nt]){
			int x=nt+c,o=1+d[nt];
			while(x<=n-1 && o<d[u]){
				if(o<d[x]){
					d[x]=o;
					pq.push(make_pair(-d[x],x));
				}
				if(x==u)x=1e9;
				x+=c;
				o++;
			}
			int a=nt-c,l=1+d[nt];
			while(a>=0 && l<d[u]){
				if(l<d[a]){
					d[a]=l;
					pq.push(make_pair(-d[a],a));
				}
				if(a==u)x=-1;
				l++;
				a-=c;
			}
			
		}
		}
 
	}
	if(d[u]==1e9){
		return -1;
	}
	else{
		return d[u];
	}
 }
 
int main(){
  ios::sync_with_stdio(false);
   cin.tie(NULL);
    int n,m,a;
	cin>>n>>m;
	vector<vector<int> >mov(n);
	vector<int>g(m);
	vector<int>g2(m);
	for(int i=0;i<m;i++){
		cin>>g[i]>>g2[i];
		mov[g[i]].push_back(a);
	}
	 bool b=false;
	for(int i=0;i<m;i++){
		if((g[i]-g[1])%g2[i]==0){
			b=true;
			break;
		}
	}
	if(b)
	cout<<menor(mov,g[0],g[1]);
	else cout<<-1;
 
    
  return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 12
• Subtask 3: 0 / 14
• Subtask 4: 0 / 21
• Subtask 5: 0 / 43