0_0_16121551_18852.cpp: In function 'int main()':
0_0_16121551_18852.cpp:4:32: error: 'scanf' was not declared in this scope
while(scanf("%d %d", &a, &b) != -1)
^
0_0_16121551_18852.cpp:6:29: error: 'printf' was not declared in this scope
printf("%d\n", a + b);
^
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