Submission #1275893

#	Time	Username	Problem	Language	Result	Execution time	Memory
1275893		PooyaDaftarian	Jakarta Skyscrapers (APIO15_skyscraper)	C++20	57 / 100	1096 ms	3228 KiB

skyscraper

#include <bits/stdc++.h>
#pragma GCC optimize("Ofast,unroll-loops,fast-math,omit-frame-pointer,no-stack-protector")
#pragma GCC target("avx,avx2,fma,sse4.2,popcnt")

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef long double ld;

#define all(x) x.begin(), x.end()
#define fast_io ios_base::sync_with_stdio(0); cin.tie(0)
#define endl '\n'
#define pb push_back
#define out(x) {cout << x << '\n'; return;}
#define ff first
#define ss second
#define sz(x) (int)(x).size()

const int maxn = 3e4+7, inf = 2e9;
vector<int> dg[maxn];
int b[maxn], p[maxn], dist[maxn];

int main(){
    fast_io;
    int n, m; cin >> n >> m;
    for (int i = 0 ; i < m ; i++)
        cin >> b[i] >> p[i], dg[b[i]].pb(p[i]);
    for (int i = 0 ; i < n ; i++)
        sort(all(dg[i])), dg[i].erase(unique(all(dg[i])), dg[i].end());
    for (int i = 0 ; i < n ; i++) dist[i] = inf;
    priority_queue<pii, vector<pii>, greater<pii>> q;
    dist[b[0]] = 0, q.push({0, b[0]});
    while (!q.empty()){
        auto [d, v] = q.top(); q.pop();
        if (d != dist[v]) continue;
        for (auto pp : dg[v]){
            for (int u = v ; u < n ; u += pp)
                if (dist[v] + (u-v)/pp < dist[u])
                    dist[u] = dist[v] + (u-v)/pp, q.push({dist[u], u});
            for (int u = v ; u >= 0 ; u -= pp)
                if (dist[v] + (v-u)/pp < dist[u])
                    dist[u] = dist[v] + (v-u)/pp, q.push({dist[u], u});
        }
    }
    cout << (dist[b[1]] == inf ? -1 : dist[b[1]]) << endl;
    return 0;
}

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