hdu 1698

#include <iostream>
#include <cstring>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <string>
#include <vector>
#include <list>
#include <map>
#include <queue>
#include <stack>
#include <bitset>
#include <algorithm>
#include <numeric>
#include <functional>
using namespace std;
#define LL long long
#define DB double
#define N 100500
const int INF = 0x3f3f3f3f;
const LL INFF = 1LL << 60;
const DB EPS = 1e-9;
const DB OO = 1e15;
const DB PI = acos(-1.0);
int sum[N*4],col[N*4],ql,qr,v;
void Pushup(int rt)
{
    sum[rt] = sum[rt<<1] + sum[rt<<1|1];
}
void build(int rt,int l,int r)
{
    sum[rt] = 1;
    col[rt] = 0;
    if(l == r) {return ;}
    int m = (l+r)>>1;
    build(rt<<1,l,m);
    build(rt<<1|1,m+1,r);
    Pushup(rt);
    return ;
}
void Pushdown(int rt,int m)
{
    if(col[rt])
    {
        col[rt<<1] = col[rt<<1|1] = col[rt];
        sum[rt<<1] = (m-(m>>1))*col[rt];
        sum[rt<<1|1] = (m>>1)*col[rt];
        col[rt] = 0;
        return ;
    }
}
void updata(int rt,int l,int r)
{
    if(l>=ql&&r<=qr)
    {
        sum[rt] = (r-l+1)*v;
        col[rt] = v;
       // Pushup(rt);
        return ;
    }
    Pushdown(rt,r-l+1);
    int m = (l+r)>>1;
    if(ql<=m) updata(rt<<1,l,m);
    if(m<qr) updata(rt<<1|1,m+1,r);
    Pushup(rt);
}
int main()
{
    int n,m,t,cas = 1;
    scanf("%d",&t);
    while(t--)
    {
        scanf("%d %d",&n,&m);
        build(1,1,n);
        while(m--)
        {
            scanf("%d %d %d",&ql,&qr,&v);
            updata(1,1,n);
        }
        printf("Case %d: The total value of the hook is %d.\n",cas++,sum[1]);
    }
    return 0;
}