标签:str hup namespace main i++ mes oid problem space
题面
https://www.luogu.org/problem/P4198
题解
#include<bits/stdc++.h> using namespace std; const int N=1e5+50; int n,m; double a[N]; struct node{ double mx; int len; } tt[4*N]; void pushup1(int x){ tt[x].mx=max(tt[x<<1].mx,tt[x<<1|1].mx); } int pushup2(double lx,int x,int l,int r){ if (tt[x].mx<=lx) return 0; if (a[l]>lx) return tt[x].len; if (l==r) return a[l]>lx; int s1=x<<1,s2=x<<1|1; int mid=l+r>>1; if (tt[s1].mx<=lx) return pushup2(lx,s2,mid+1,r); else return pushup2(lx,s1,l,mid)+tt[x].len-tt[s1].len; } void chan(int x,int l,int r,int to,int c){ if (l==r && l==to) { tt[x].mx=(double)c/to; tt[x].len=1; return; } int mid=l+r>>1; if (to<=mid) chan(x<<1,l,mid,to,c); else if (to>mid) chan(x<<1|1,mid+1,r,to,c); pushup1(x); tt[x].len=tt[x<<1].len+pushup2(tt[x<<1].mx,x<<1|1,mid+1,r); } int main(){ scanf("%d %d",&n,&m); int x,y; for (int i=1;i<=m;i++) { scanf("%d %d",&x,&y); a[x]=(double)y/x; chan(1,1,n,x,y); printf("%d\n",tt[1].len); } return 0; }
标签:str hup namespace main i++ mes oid problem space
原文地址:https://www.cnblogs.com/shxnb666/p/11427292.html