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View Compilation Error

0_0_17016405_14842.cpp: In function 'int main()':
0_0_17016405_14842.cpp:5:23: error: 'scanf' was not declared in this scope
  while(~scanf("%d", &n) && n)
                       ^
0_0_17016405_14842.cpp:7:32: error: 'printf' was not declared in this scope
   printf("%d %d\n", n, sum[n-1]);
                                ^


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