View Compilation Error

350311_0_1095.cpp:5: error: expected init-declarator before "long"
350311_0_1095.cpp:5: error: expected `,' or `;' before "long"
350311_0_1095.cpp:6: error: `int64' does not name a type
350311_0_1095.cpp: In function `int main()':
350311_0_1095.cpp:14: error: `dp' undeclared (first use this function)
350311_0_1095.cpp:14: error: (Each undeclared identifier is reported only once for each function it appears in.)