Submission #523200

#	Time	Username	Problem	Language	Result	Execution time	Memory
523200		vonatlus	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	57 / 100	370 ms	34708 KiB

skyscraper

/// adil sultanov | vonat1us 

#pragma GCC optimize("O3")
//#pragma comment(linker, "/STACK:36777216")

#include<bits/stdc++.h>

#define x first
#define y second
#define pb push_back
#define sz(x) (int) x.size()
#define all(z) (z).begin(), (z).end()
 
using namespace std;

using ll = long long;
using pii = pair<int, int>;                                   

const int MOD = 1e9 + 7; 
const int INF = 1e9 + 1e2;
  
void fin() {
#ifdef AM
    freopen(".in", "r", stdin);
#endif        
}                   

const bool flag = 0;

const int M = 3e4+10;
const int N = 2e3+10;

int d[M], dist[N][N];

vector<pii> adj[M];

void dijkstra(vector<int> b, int n) {
    for (int i = 0; i < n; ++i) {
        d[i] = INF;
    }
    d[b[0]] = 0;
    priority_queue<pii> q;
    q.push({0, b[0]});
    while (!q.empty()) {
        auto [w, x] = q.top();
        q.pop();
        if (d[x] != -w) continue;
        for (int i = 0; i < n; ++i) {
            if (i == x) continue;
            if (d[i] > d[x]+dist[x][i]) {
                d[i] = d[x]+dist[x][i];
                q.push({-d[i], i});
            }
        }
    }
}

void ma1n() {
    int n, m;
    cin >> n >> m;
    vector<int> b(m), p(m);
    for (int i = 0; i < m; ++i) {
        cin >> b[i] >> p[i];
    }
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < n; ++j) {
            if (i != j) {
                dist[i][j] = INF;
            }
        }
    }
    for (int i = 0; i < m; ++i) {
        for (int j = b[i]; j < n; j += p[i]) {
            dist[b[i]][j] = min(dist[b[i]][j], (j-b[i])/p[i]);
        }
        for (int j = b[i]; j >= 0; j -= p[i]) {
            dist[b[i]][j] = min(dist[b[i]][j], (b[i]-j)/p[i]);
        }
    }
    dijkstra(b, n);
    cout << (d[b[1]] == INF ? -1 : d[b[1]]);
} 

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(nullptr), fin();
    int ts = 1;
    if (flag) {
        cin >> ts;
    }
    while (ts--) {
        ma1n(); 
    }
    return 0;
}

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