0_0_34543455_16495.cpp: In function 'int main()':
0_0_34543455_16495.cpp:5:29: error: 'scanf' was not declared in this scope
while(~scanf("%lf%lf",&n,&m)){
^
0_0_34543455_16495.cpp:12:22: error: 'printf' was not declared in this scope
printf("%.2lf\n",sum);
^
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