#include #include #include /** * 2492. Minimum Score of a Path Between Two Cities * * You are given a positive integer n representing n cities numbered from 1 to n. You are also given a 2D array roads where roads[i] = [ai, bi, distancei] indicates that there is a bidirectional road between cities ai and bi with a distance equal to distancei. The cities graph is not necessarily connected. * * The score of a path between two cities is defined as the minimum distance of a road in this path. * * Return the minimum possible score of a path between cities 1 and n. * * Note: * * A path is a sequence of roads between two cities. * It is allowed for a path to contain the same road multiple times, and you can visit cities 1 and n multiple times along the path. * The test cases are generated such that there is at least one path between 1 and n. */ class UnionFindSet { private: std::vector f; public: explicit UnionFindSet(int n) : f(n + 1) { std::iota(f.begin(), f.end(), 0); } int find(int x) { return (x == f[x]) ? x : (f[x] = find(f[x])); } // Merge y to x int uni(int x, int y) { return f[find(y)] = find(x); } }; class Solution { public: static int minScore(int n, const std::vector>& roads) { UnionFindSet ufs(n); for (const auto & road : roads) ufs.uni(road[0], road[1]); int ret = 0x7FFFFFFF; const int f1 = ufs.find(1); for (const auto& road: roads) if (ufs.find(road[0]) == f1) ret = std::min(ret, road[2]); return ret; } }; int main() { std::cout << Solution::minScore(14, {{2,9,2308},{2,5,2150},{12,3,4944},{13,5,5462},{2,10,2187},{2,12,8132},{2,13,3666},{4,14,3019},{2,4,6759},{2,14,9869},{1,10,8147},{3,4,7971},{9,13,8026},{5,12,9982},{10,9,6459}}); return 0; }