Submission #1028606

#	Time	Username	Problem	Language	Result	Execution time	Memory
1028606		vjudge1	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	57 / 100	35 ms	4880 KiB

skyscraper

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

const int N = 2010, M = 30010;
int n, m, b[M], p[M], dist[N];
bool mark[N], exist[N][N];


int main(){
    cin >> n >> m;
    for (int i = 0; i < m; i ++){
        cin >> b[i] >> p[i];
        exist[b[i]][p[i]] = 1;
    }

    memset(dist, 63, sizeof dist);
    dist[b[0]] = 0;

    for (int ii = 0; ii < n; ii ++){
        int v = -1;
        for (int j = 0; j < n; j ++)
            if (!mark[j] and (v == -1 or dist[v] > dist[j]))
                v = j;

        mark[v] = 1;
        for (int d = 1; d <= n; d ++){
            if (!exist[v][d]) continue;
            for (int i = 1; v + d * i < n; i ++)
                dist[v + d * i] = min(dist[v + d * i], dist[v] + i);
            for (int i = 1; v - d * i >= 0; i ++)
                dist[v - d * i] = min(dist[v - d * i], dist[v] + i);
        }
    }

    if (dist[b[1]] > 1e9)
        dist[b[1]] = -1;
    cout << dist[b[1]] << endl;
}

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