Submission #1275765

#	Time	Username	Problem	Language	Result	Execution time	Memory
1275765		namious	Jakarta Skyscrapers (APIO15_skyscraper)	C++20	36 / 100	458 ms	327680 KiB

skyscraper

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

// #define int long long
// #define ll long long
#define pii pair<int,int>
#define pb push_back
#define endl '\n'
#define fast_io ios_base::sync_with_stdio(0) ,cin.tie(0),cout.tie(0);
#pragma GCC optimize("O3,unroll-loops")

const int maxn = 3e4+4 , mod = 1e9+7 , inf = 1e9;

int n,m;
int p[maxn];
int b[maxn];
vector <pii> adj[maxn];
int dis[maxn];
priority_queue <pii , vector<pii> , greater<pii>> pq;

int32_t main(){
    fast_io

    cin >> n >> m;
    for(int i = 0 ; i < n ; i++) dis[i] = inf;
    for(int i = 0 ; i < m ; i++){
        cin >> b[i] >> p[i];
    }

    for(int i = 0 ; i < m ; i++){
        for(int j = 0 ; j < n ; j++){
            if(j%p[i] == b[i]%p[i]) adj[b[i]].pb({j,abs(j-b[i])/p[i]});
        }
    }

    dis[b[0]] = 0 , pq.push({0,b[0]});
    while(pq.size()){
        auto [d,v] = pq.top();
        pq.pop();
        if(d > dis[v])continue;
        for(auto [u,w] : adj[v]){
            if(dis[v]+w < dis[u]){
                dis[u] = dis[v]+w;
                pq.push({dis[u],u});
            }
        }
    }

    if(dis[b[1]] != inf) cout << dis[b[1]] << endl;
    else cout << -1 << endl;

    return 0;
}

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