This documentation is automatically generated by online-judge-tools/verification-helper
View the Project on GitHub maguroplusia/Library
#define PROBLEM "https://onlinejudge.u-aizu.ac.jp/courses/library/5/GRL/2/GRL_2_A" #include<bits/stdc++.h> using namespace std; #include"../../Other/Template.cpp" #include"../../Graph/Kruskal.cpp" int main() { cin >> N >> M; for(int i = 0;i < M;i++) { int s,t; long long w; cin >> s >> t >> w; graph[i] = edge{s,t,w}; } cout << Kruskal() << endl; }
#line 1 "Test/AOJ/Kruskal.test.cpp" #define PROBLEM "https://onlinejudge.u-aizu.ac.jp/courses/library/5/GRL/2/GRL_2_A" #include<bits/stdc++.h> using namespace std; #line 1 "Other/Template.cpp" constexpr int Inf = 2000000030; constexpr long long INF= 2000000000000000000; template<typename T> inline bool chmax(T &a, T b) { if (a < b) { a = b; return true; } return false; } template<typename T> inline bool chmin(T &a, T b) { if (a > b) { a = b; return true; } return false; } #line 1 "DataStructure/UnionFind.cpp" class UnionFind { vector<int> par; vector<int> siz; public: UnionFind(int n) { par.resize(n); siz.resize(n); for(int i = 0;i < n;i++) { par[i] = i; siz[i] = 1; } } int find(int x) { if(par[x] == x) { return x; } else { return par[x] = find(par[x]); } } void unite(int x,int y) { x = find(x); y = find(y); if(x == y) { return; } if(siz[x] < siz[y]) { swap(x,y); } par[y] = x; siz[x] += siz[y]; } bool same(int x,int y) { return find(x) == find(y); } int size(int x) { return siz[find(x)]; } }; #line 2 "Graph/Kruskal.cpp" struct edge { int u,v; long long cost; bool operator<(const edge& b) const { return cost < b.cost; } }; int N,M; edge graph[200010]; long long Kruskal() { sort(graph,graph + M); UnionFind uf(N); long long ret = 0; for(int i = 0;i < M;i++) { edge e = graph[i]; if(!uf.same(e.u,e.v)) { uf.unite(e.u,e.v); ret += e.cost; } } return ret; } #line 8 "Test/AOJ/Kruskal.test.cpp" int main() { cin >> N >> M; for(int i = 0;i < M;i++) { int s,t; long long w; cin >> s >> t >> w; graph[i] = edge{s,t,w}; } cout << Kruskal() << endl; }