View Compilation Error

0_0_9140583_30439.cpp:6: error: `_int64' does not name a type
0_0_9140583_30439.cpp: In function `int main()':
0_0_9140583_30439.cpp:16: error: `dp' undeclared (first use this function)
0_0_9140583_30439.cpp:16: error: (Each undeclared identifier is reported only once for each function it appears in.)