leetcode 743. 网络延迟时间

class Solution
{
public:
int networkDelayTime(vector<vector<int>>& times, int n, int k)
{
    vector<int> visitedCodes;
    visitedCodes.push_back(k);
    vector<vector<int>> roads(n + 1, vector<int>(n + 1, -1));
    vector<int> minroads;
    vector<int> visited(n + 1, 0);
…        mintime += tmin;
    }
    return mintime;
}
};