Billboard

At the entrance to the university, there is a huge rectangular billboard of size h*w (h is its height and w is its width). The board is the place where all possible announcements are posted: nearest programming competitions, changes in the dining room menu, and other important information. On September 1, the billboard was empty. One by one, the announcements started being put on the billboard. Each announcement is a stripe of paper of unit height. More specifically, the i-th announcement is a rectangle of size 1 * wi. When someone puts a new announcement on the billboard, she would always choose the topmost possible position for the announcement. Among all possible topmost positions she would always choose the leftmost one. If there is no valid location for a new announcement, it is not put on the billboard (that's why some programming contests have no participants from this university). Given the sizes of the billboard and the announcements, your task is to find the numbers of rows in which the announcements are placed.

There are multiple cases (no more than 40 cases). The first line of the input file contains three integer numbers, h, w, and n (1 <= h,w <= 10^9; 1 <= n <= 200,000) - the dimensions of the billboard and the number of announcements. Each of the next n lines contains an integer number wi (1 <= wi <= 10^9) - the width of i-th announcement.

For each announcement (in the order they are given in the input file) output one number - the number of the row in which this announcement is placed. Rows are numbered from 1 to h, starting with the top row. If an announcement can't be put on the billboard, output "-1" for this announcement.

3 5 524333

1213-1

hhanger@zju

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        using namespace std;#define lson l,m,rt<<1#define rson m+1,r,rt<<1|1#define M 222222int MAX[M<<2];int h,w,n;void pushup(int rt){	MAX[rt]=max(MAX[rt<<1],MAX[rt<<1|1]);//求节点的最大值 }void build(int l,int r,int rt){	MAX[rt]=w;//初始化宽度 	if(l==r)	return ;	int m=(l+r)>>1;	build(lson);	build(rson);}int query(int x,int l,int r,int rt){	if(l==r)	{		MAX[rt]-=x;//该行的可以贴广告长度需要减去x 		return l;	}	int m=(l+r)>>1;	int res;	if(MAX[rt<<1]>=x)//如果左儿子的长度可以满足x的长度 左子树较小 先判断左子树 后判断右子树 	{		res=query(x,lson);	}	else res=query(x,rson);	pushup(rt);//将左右子树更新 减去了x 	return res;}int main(){	while(~scanf("%d%d%d",&h,&w,&n))	{		if(h>n)h=n;//剪枝 防止h过大 有n个广告 最多h宽度即可 		build(1,h,1);		while(n--)		{			int x;			scanf("%d",&x);			if(MAX[1]