0_0_25614091_23808.c:4:5: error: variably modified 'tree' at file scope
int tree[maxn][2];
^
0_0_25614091_23808.c:5:5: error: variably modified 'val' at file scope
int val[maxn];
^
0_0_25614091_23808.c: In function 'main':
0_0_25614091_23808.c:78:13: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
for(int i=cnt+1;i<=33;i++)
^
0_0_25614091_23808.c:78:13: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
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