0_0_19645302_20612.c: In function 'main':
0_0_19645302_20612.c:4:39: error: 'EOF' undeclared (first use in this function)
while(scanf("%d %d %d",&n,&u,&d)!=EOF&&n!=0)
^
0_0_19645302_20612.c:4:39: note: each undeclared identifier is reported only once for each function it appears in
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