0_0_18643316_24847.cpp: In function 'int main()':
0_0_18643316_24847.cpp:4:27: error: 'scanf' was not declared in this scope
while (scanf("%d%d",&a,&b)!=EOF)
^
0_0_18643316_24847.cpp:4:30: error: 'EOF' was not declared in this scope
while (scanf("%d%d",&a,&b)!=EOF)
^
0_0_18643316_24847.cpp:7:20: error: 'printf' was not declared in this scope
printf("%d\n",sum);
^
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