#include <stdio.h>

int board[100][100];
int maxboard[100][100];
int n;


int maxresult(){
    maxboard[0][0]=board[0][0];

    for(int i=0; i<n;i++)
        for(int j=0;j<i+1;j++){

            if(i==0) maxboard[i][j]=maxboard[i-1][j]+board[i][j];

            else if(board[i-1][j]=='\0') maxboard[i][j]=maxboard[i-1][j-1]+board[i][j];

            else{
                int temp1=maxboard[i-1][j-1]+board[i][j];
                int temp2=maxboard[i-1][j]+board[i][j];

                if(temp1>temp2) maxboard[i][j]= temp1;
                else maxboard[i][j]=temp2;
            }

        }



    /*for(int i=0; i<n;i++){
            for(int j=0;j<i+1;j++)
                printf("%d  ",maxboard[i][j]);
            printf("\n");
    }
    printf("\n");
    */

    int max=0;
    for(int i=0;i<n;i++){
        if(max<maxboard[n-1][i]) max=maxboard[n-1][i];
    }

    return max;
}



int main(){

    int T;
    scanf("%d",&T);


    while(T--){

        scanf("%d",&n);

        for(int i=0; i<n;i++)
            for(int j=0;j<i+1;j++)
                scanf("%d",&board[i][j]);

        printf("%d\n",maxresult());

    }




}