0_0_13315492_20704.c:5:5: error: variably modified 'sum' at file scope
int sum[maxn<<2];
^
0_0_13315492_20704.c: In function 'main':
0_0_13315492_20704.c:48:5: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
for(int i = 1 ; i <= T ; i ++ )
^
0_0_13315492_20704.c:48:5: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
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