0_0_18876080_6191.c: In function 'main':
0_0_18876080_6191.c:6:29: error: 'EOF' undeclared (first use in this function)
while(scanf("%d%d",&n,&m)!=EOF){
^
0_0_18876080_6191.c:6:29: note: each undeclared identifier is reported only once for each function it appears in
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