1 条题解

  • 0
    @ 2025-4-4 14:07:45
    #include <bits/stdc++.h>
    using namespace std;
    const int MOD = 100003;
    int n, m;
    vector<int> e[1123456];
    int dis[1123456];
    int cnt[1123456];
    queue<int> q;
    int main()
    {
        ios::sync_with_stdio(false);
        cin.tie(0);
        cin >> n >> m;
        for (int i = 1; i <= m; i++)
        {
            int u, v;
            cin >> u >> v;
            e[u].push_back(v);
            e[v].push_back(u);
        }
        memset(dis, 0x3f, sizeof(dis));
        q.push(1);
        dis[1] = 0;
        cnt[1] = 1;
        while (!q.empty())
        {
            int u = q.front();
            q.pop();
            for (int i = 0; i < e[u].size(); i++)
            {
                int v = e[u][i];
                if (dis[u] + 1 < dis[v])
                {
                    dis[v] = dis[u] + 1;
                    cnt[v] = cnt[u];
                    q.push(v);
                }
                else if (dis[u] + 1 == dis[v])
                {
                    cnt[v] = (cnt[v] + cnt[u]) % MOD;
                }
            }
        }
        for (int i = 1; i <= n; i++)
            cout << cnt[i] << "\n";
        return 0;
    }
    
    • 1

    信息

    ID
    1787
    时间
    1000ms
    内存
    512MiB
    难度
    4
    标签
    递交数
    32
    已通过
    13
    上传者