HDU-1213 How Many Tables
作者:互联网
1 #include <bits/stdc++.h> 2 #define pb push_back 3 #define _for(i,a,b) for(int i = (a);i < (b);i ++) 4 #define INF 0x3f3f3f3f 5 #define sz size() 6 7 using namespace std; 8 typedef long long ll; 9 #define _for(i,a,b) for(int i = (a);i < (b);i ++) 10 const int maxn = 50003; 11 int par[maxn]; //父亲 12 int high[maxn]; //树的高度 13 int n; 14 void init(int n) 15 { 16 _for(i,0,n) 17 { 18 par[i] = i; 19 high[i] = 0; 20 } 21 } 22 23 int find(int x) 24 { 25 return par[x] == x ? x : par[x] = find(par[x]); 26 } 27 28 void unite(int x,int y) 29 { 30 x = find(x);y = find(y); 31 if(x==y) return ; 32 n --; 33 if(high[x]<high[y]) 34 par[x] = y; 35 else 36 { 37 par[y] = x; 38 if(high[x]==high[y]) 39 high[x] ++; 40 } 41 } 42 43 bool same(int x,int y) 44 { 45 return find(x) == find(y); 46 } 47 48 49 int main() 50 { 51 int T; 52 scanf("%d",&T); 53 while(T--) 54 { 55 int N,M; 56 scanf("%d %d",&N,&M); 57 n = N; 58 init(N+1); 59 while(M--) 60 { 61 int a,b; 62 scanf("%d %d",&a,&b); 63 unite(a,b); 64 } 65 cout << n <<endl; 66 } 67 return 0; 68 }
标签:Tables,HDU,1213,int,par,high,maxn,find,define 来源: https://www.cnblogs.com/Asurudo/p/10685243.html