0_0_20594745_32722.cpp: In function 'int main()':
0_0_20594745_32722.cpp:23:18: error: 'scanf' was not declared in this scope
scanf("%d",&t);
^
0_0_20594745_32722.cpp:38:41: error: 'printf' was not declared in this scope
printf("Case #%d: %d\n",ca++,ans);
^
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