0_0_25063752_32629.cpp: In function 'int main()':
0_0_25063752_32629.cpp:92:26: error: unable to find numeric literal operator 'operator""B'
ll mid = en %2B st >> 1, ans = check(mid);
^
0_0_25063752_32629.cpp:92:26: note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes
0_0_25063752_32629.cpp:93:17: error: 'ans' was not declared in this scope
if (ans > n) en = mid;
^
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