0_0_18112749_5306.cpp: In function 'int main()':
0_0_18112749_5306.cpp:28:31: error: 'scanf' was not declared in this scope
while(scanf("%d %d",&m,&n)&&m+n)
^
0_0_18112749_5306.cpp:44:28: error: 'printf' was not declared in this scope
printf("%d\n",sum);
^
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