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Feb 8th, 2016
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  1. #include <stdio.h>
  2.  
  3. int main() {
  4. int a , b;
  5. while(scanf("%d%d",&a ,&b) != EOF)
  6. printf("%d\n", 2 * a + 2 * b);
  7. return 0;
  8. }
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