#include<stdio.h>

 #include<string.h>

 #define max(a,b) (a)>(b)?a:b

 int g[][],dp[][];

 int max1(int i,int j){

     return i>j?i:j;

 }

 int main(){

     int C;

     while(scanf("%d",&C)!=EOF){

         for(int q=;q<=C;q++){

             int N;

             scanf("%d",&N);

             memset(dp,,sizeof(dp));

             int i,j;

             for(i=;i<=N;i++){

                 for(j=;j<=i;j++){

                     scanf("%d",&g[i][j]);

                 }

             }

             dp[][]=g[][];

             for(i=;i<=N;i++){

                 for(j=;j<=i;j++){

                     if(j==)dp[i][j]=dp[i-][j]+g[i][j];

                     else if(j==i)dp[i][j]=dp[i-][j-]+g[i][j];

                     else dp[i][j]=max1(dp[i-][j-],dp[i-][j])+g[i][j];

                 }

             }

             int m=dp[N][];

             for(i=;i<=N;i++)if(dp[N][i]>m)m=dp[N][i];

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

         }

     }

     return ;

 }