0_0_23004807_26754.cpp: In function 'int main()':
0_0_23004807_26754.cpp:13:41: error: 'M_PI' was not declared in this scope
long long l=log10((long double)(sqrt(2*M_PI*n))) +n*log10((long double)n/M_E);
^
0_0_23004807_26754.cpp:13:82: error: 'M_E' was not declared in this scope
long long l=log10((long double)(sqrt(2*M_PI*n))) +n*log10((long double)n/M_E);
^
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