题目大意
给出n个人的权值,每次要求将两队人合成一堆,或者杀掉一堆人中的权值最小的那个人,
BZOJ 1455 罗马游戏 可并堆
。问每次删除的人的权值是多少。思路
就是可并堆,没了。我挑最简单的随机堆写的。
CODE
<code class="language-cpp hljs ">#include<cstdio>#include<cstring>#include<iostream>#include #define MAX 1000010using namespace std;struct Heap{ Heap *son[2]; int val; Heap(int _):val(_) { son[0] = son[1] = NULL; } Heap() {}}*heap[MAX],mempool[MAX],*C = mempool + 1;Heap *Merge(Heap *x,Heap *y){ if(x == NULL) return y; if(y == NULL) return x; if(x->val > y->val) swap(x,y); bool k = rand()&1; x->son[k] = Merge(x->son[k],y); return x;}int points,asks;int src[MAX];bool killed[MAX];char s[10];int father[MAX];int Find(int x){ if(father[x] == x) return x; return father[x] = Find(father[x]);}int main(){ srand(19970806); cin >> points; for(int i = 1; i <= points; ++i) father[i] = i; for(int x,i = 1; i <= points; ++i) { scanf("%d",&x); heap[i] = new (C++)Heap(x); } cin >> asks; for(int x,y,i = 1; i <= asks; ++i) { scanf("%s",s); if(s[0] == 'M') { scanf("%d%d",&x,&y); if(killed[x] || killed[y]) continue; int fx = Find(x),fy = Find(y); if(fx == fy) continue; father[fy] = fx; heap[fx] = Merge(heap[fx],heap[fy]); } else { scanf("%d",&x); if(killed[x]) { puts("0"); continue; } int fx = Find(x); printf("%d\n",heap[fx]->val); killed[heap[fx] - mempool] = true; heap[fx] = Merge(heap[fx]->son[0],heap[fx]->son[1]); } } return 0;}</iostream></cstring></cstdio></code>