0_0_16411145_18493.cpp: In function 'int main()':
0_0_16411145_18493.cpp:4:26: error: 'a' was not declared in this scope
while(scanf("%d %d",&a,&b)!=EOF)
^
0_0_16411145_18493.cpp:4:29: error: 'b' was not declared in this scope
while(scanf("%d %d",&a,&b)!=EOF)
^
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