Submission #582513

#	Time	Username	Problem	Language	Result	Execution time	Memory
582513		gg123_pe	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	36 / 100	84 ms	64560 KiB

skyscraper

#include <bits/stdc++.h>
using namespace std; 

typedef long long ll; 
typedef pair<ll,ll> ii; 

#define f(i,a,b) for(int i = a; i < b; i++)
#define fa(i,a,b) for(int i = a; i >= b; i--)

const int N = 2005; 
const ll inf = 1e9;

// B 

ll n, m, b[N], p[N], d[N]; 
vector <pair<int,ll>> adj[N];

void dij(int x){
    f(i,0,m) d[i] = inf; 
    d[x] = 0; 

    priority_queue <ii, vector <ii>, greater<ii>> q; 
    q.push({0, x}); 

    while(!q.empty()){
        ii p = q.top(); 
        q.pop(); 

        ll d_v = p.first, v = p.second; 

        if(d_v != d[v]) continue; 

        for(auto wi: adj[v]){
            ll u = wi.first, w = wi.second; 
            if(d[u] > d[v] + w){
                d[u] = d[v] + w; 
                q.push({d[u], u}); 
            }
        }
    }
}
int main(){
    cin >> n >> m; 

    f(i,0,m){
        cin >> b[i] >> p[i]; 
    }

    f(i,0,m){
        f(j,0,m){
            ll x = abs(b[i]-b[j]); 
            if(x%p[i]) continue; 
            adj[i].push_back({j, x/p[i]}); 
        }
    }

    if(b[0] == b[1]){
        cout << "0\n"; 
        return 0;
    }
    dij(0); 
    cout << ((d[1] == inf) ? -1 : d[1]) << "\n"; 
    return 0; 
}

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