/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
 
 
		int a[]= new int[6];
		int m[][]={{1,2,100}, {2,5,100},{3,4,100}};
 
		for(int i=0; i<m.length;i++){
			int arr[]=m[i];
			for(int k=arr[0]; k<=arr[1]; k++)
			a[k]+=arr[2];
 
		}
		int max=0;
		for(int j=0; j<a.length;j++){
			if(max<a[j])
			max=a[j];
 
		}
		System.out.println(max);
	}
}

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