1 //#define LOCAL
 2 #include<cstdio>
 3 #include<cstring>
 4 using namespace std;
 5 const int maxn=102;
 6 int mat[maxn][maxn],dp[maxn][maxn];
 7 int max(int a,int b)
 8 {
 9   return a>b?a:b;
10 }
11 int main()
12 {
13   #ifdef LOCAL
14    freopen("test.in","r",stdin);
15   #endif
16   int n,i,j,cas;
17   scanf("%d",&cas);
18   while(cas--)
19   {
20       scanf("%d",&n);
21       memset(dp,0,sizeof(dp));
22       for(i=1;i<=n;i++)
23       for(j=1;j<=i;j++)
24         scanf("%d",&mat[i][j]);
25     for(i=n;i>=0;i--)
26     {
27         mat[i][n+1]=0;
28       for(j=1;j<=n;j++)
29         dp[i][j]=max(dp[i+1][j],dp[i+1][j+1])+mat[i][j];
30     }
31     printf("%d\n",dp[0][1]);
32   }
33    return 0;
34 }