Create 1698_libin56842.cpp

From http://blog.csdn.net/libin56842/article/details/13511181
This commit is contained in:
KiritoTRw 2016-08-11 09:11:03 +08:00 committed by GitHub
parent c7c23ae7f9
commit b5c465a0f7

80
HDOJ/1698_libin56842.cpp Normal file
View File

@ -0,0 +1,80 @@
#include <stdio.h>
#include <string.h>
#include <algorithm>
using namespace std;
const int maxn = 100000+10;
int n,sum;
struct node
{
int l,r,n;
} a[maxn<<2];
void init(int l,int r,int i)
{
a[i].l = l;
a[i].r = r;
a[i].n = 1;
if(l!=r)
{
int mid = (l+r)>>1;
init(l,mid,2*i);
init(mid+1,r,2*i+1);
}
}
void insert(int i,int x,int y,int m)
{
if(a[i].n == m)//相同则不用修改了
return ;
if(a[i].l == x && a[i].r == y)//找到了区间,直接更新
{
a[i].n = m;
return ;
}
if(a[i].n != -1)//如果该区间只有一种颜色
{
a[2*i].n = a[2*i+1].n = a[i].n;//由于后面必定对子树操作,所以更新子树的值等于父亲的值
a[i].n = -1;//由于该区域颜色与修改不同,而且不是给定区域,所以该区域必定为杂色
}
//父区间为杂色时对所有子节点进行操作
int mid = (a[i].l+a[i].r)>>1;
if(x>mid)
insert(2*i+1,x,y,m);
else if(y<=mid)
insert(2*i,x,y,m);
else
{
insert(2*i,x,mid,m);
insert(2*i+1,mid+1,y,m);
}
}
int find(int i)//区间求和
{
if(a[i].n != -1)//纯色直接算这个区间
return (a[i].r - a[i].l+1)*a[i].n;
else//不存则左右子树去找
return find(i*2)+find(i*2+1);
}
int main()
{
int t,i,k,x,y,m;
int cas = 1;
scanf("%d",&t);
while(t--)
{
scanf("%d%d",&n,&k);
init(1,n,1);
while(k--)
{
scanf("%d%d%d",&x,&y,&m);
insert(1,x,y,m);
}
printf("Case %d: The total value of the hook is %d.\n",cas++,find(1));
}
return 0;
}