diff --git a/cpp/2303/230322.cpp b/cpp/2303/230322.cpp new file mode 100644 index 0000000..2d6d995 --- /dev/null +++ b/cpp/2303/230322.cpp @@ -0,0 +1,58 @@ +#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; +} diff --git a/cpp/2303/CMakeLists.txt b/cpp/2303/CMakeLists.txt index c193ebd..875baf9 100644 --- a/cpp/2303/CMakeLists.txt +++ b/cpp/2303/CMakeLists.txt @@ -3,4 +3,4 @@ PROJECT(2303) SET(CMAKE_CXX_STANDARD 23) -ADD_EXECUTABLE(2303 230322-CN.cpp) +ADD_EXECUTABLE(2303 230322.cpp)