0_0_20620504_30386.cpp: In function 'int main()':
0_0_20620504_30386.cpp:28:15: error: 'n' was not declared in this scope
while (scand(n)==1 && n){
^
0_0_20620504_30386.cpp:13:30: note: in definition of macro 'scand'
#define scand(x) scanf("%d",&x)
^
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