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#include<stdio.h> #include<algorithm> #include<string.h> #define N 500005 #define inf 0x3f3f3f3f using namespace std; int root,d; int Min,Max; int n,m,op,x,y; int ans; struct node { int l,r,xy[2],Max[2],Min[2]; friend bool operator < (node a, node b) { if(a.xy[d] == b.xy[d]) return a.xy[d^1] < b.xy[d^1]; return a.xy[d] < b.xy[d]; } } kd_tree[N<<2],_new; void push_up(int rt, node a) { kd_tree[rt].Min[0] = min(kd_tree[rt].Min[0], a.Min[0]); kd_tree[rt].Max[0] = max(kd_tree[rt].Max[0], a.Max[0]); kd_tree[rt].Min[1] = min(kd_tree[rt].Min[1], a.Min[1]); kd_tree[rt].Max[1] = max(kd_tree[rt].Max[1], a.Max[1]); } int build(int l, int r, int o) { int mid = (l + r) >> 1; d = o; nth_element(kd_tree+l, kd_tree+mid, kd_tree+r+1); for(int i = 0; i < 2; ++i) kd_tree[mid].Min[i] = kd_tree[mid].Max[i] = kd_tree[mid].xy[i]; kd_tree[mid].l = kd_tree[mid].r = 0; if(l < mid)kd_tree[mid].l = build(l, mid-1, o^1); if(r > mid)kd_tree[mid].r = build(mid+1, r, o^1); if(kd_tree[mid].l)push_up(mid, kd_tree[kd_tree[mid].l]); if(kd_tree[mid].r)push_up(mid, kd_tree[kd_tree[mid].r]); return mid; } void _insert(int rt, int o) { if(_new.xy[o] >= kd_tree[rt].xy[o]) { if(kd_tree[rt].r) _insert(kd_tree[rt].r, o^1); else { kd_tree[rt].r = ++n; kd_tree[n] = _new; } } else { if(kd_tree[rt].l) _insert(kd_tree[rt].l, o^1); else { kd_tree[rt].l = ++n; kd_tree[n] = _new; } } if(kd_tree[rt].l)push_up(rt, kd_tree[kd_tree[rt].l]); if(kd_tree[rt].r)push_up(rt, kd_tree[kd_tree[rt].r]); } int get_min(node a) { int res = 0; if(x > a.Max[0])res += x - a.Max[0]; if(x < a.Min[0])res += a.Min[0] - x; if(y > a.Max[1])res += y - a.Max[1]; if(y < a.Min[1])res += a.Min[1] - y; return res; } void query(int rt) { int dis = abs(kd_tree[rt].xy[0] - x) + abs(kd_tree[rt].xy[1] - y); ans = min(ans, dis); int lmin = inf,rmin = inf; int l = kd_tree[rt].l,r = kd_tree[rt].r; if(l)lmin = get_min(kd_tree[l]); if(r)rmin = get_min(kd_tree[r]); if(lmin < rmin) { if(lmin < ans)query(l); if(rmin < ans)query(r); } else { if(rmin < ans)query(r); if(lmin < ans)query(l); } } int main() { scanf("%d%d", &n,&m); for(int i = 1; i <= n; ++i) scanf("%d%d", &kd_tree[i].xy[0],&kd_tree[i].xy[1]); root = build(1, n, 0); while(m--) { scanf("%d%d%d", &op,&x,&y); if(op == 1) { _new.l = 0,_new.r = 0; _new.xy[0] = _new.Min[0] = _new.Max[0] = x; _new.xy[1] = _new.Min[1] = _new.Max[1] = y; _insert(root, 0); } else { ans = inf; query(root); printf("%d\n", ans); } } return 0; }
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