题目大意：给出计算机之间的连接配置，询问某两台计算机是否相连。判断两个点是否在同一个连通分量里，用并查集处理。
1 #include <cstdio> 2 #define MAXN 1000000 3 4 int p[MAXN]; 5 6 int find(int x) 7 { 8 return (x == p[x]) ? x : p[x] = find(p[x]); 9 } 10 11 int main() 12 { 13 #ifdef LOCAL 14 freopen("in", "r", stdin); 15 #endif 16 int T; 17 scanf("%d", &T); 18 while (T--) 19 { 20 int n; 21 scanf("%d", &n); 22 getchar(); 23 for (int i = 1; i <= n; i++) 24 p[i] = i; 25 char str[10000]; 26 int success = 0, fail = 0; 27 while (gets(str)) 28 { 29 if (str[0] == 0) break; 30 int a, b; 31 sscanf(str+1, "%d%d", &a, &b); 32 int pa = find(a); 33 int pb = find(b); 34 if (str[0] == 'c') 35 { 36 if (pa != pb) p[pb] = pa; 37 } 38 else if (str[0] == 'q') 39 { 40 if (pa != pb) fail++; 41 else success++; 42 } 43 } 44 printf("%d,%d ", success, fail); 45 if (T) printf(" "); 46 } 47 return 0; 48 }