View Compilation Error

0_0_7725243_23842.cpp:17: error: `_int64' does not name a type
0_0_7725243_23842.cpp: In function `void BFS()':
0_0_7725243_23842.cpp:30: error: `d' undeclared (first use this function)
0_0_7725243_23842.cpp:30: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_7725243_23842.cpp:30: error: `G' undeclared (first use this function)
0_0_7725243_23842.cpp: At global scope:
0_0_7725243_23842.cpp:51: error: `_int64' does not name a type
0_0_7725243_23842.cpp: In function `int main()':
0_0_7725243_23842.cpp:73: error: `d' undeclared (first use this function)
0_0_7725243_23842.cpp:73: error: integer constant is too large for "long" type
0_0_7725243_23842.cpp:74: error: `G' undeclared (first use this function)
0_0_7725243_23842.cpp:79: error: `path' undeclared (first use this function)
0_0_7725243_23842.cpp:81: error: `DFS' undeclared (first use this function)