View Compilation Error

0_0_10779984_12342.cpp:17: error: `_int64' does not name a type
0_0_10779984_12342.cpp:18: error: `_int64' does not name a type
0_0_10779984_12342.cpp:50: error: `_int64' does not name a type
0_0_10779984_12342.cpp: In function `int main()':
0_0_10779984_12342.cpp:69: error: `_int64' undeclared (first use this function)
0_0_10779984_12342.cpp:69: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_10779984_12342.cpp:69: error: expected `;' before "p"
0_0_10779984_12342.cpp:74: error: `p' undeclared (first use this function)
0_0_10779984_12342.cpp:74: error: `q' undeclared (first use this function)
0_0_10779984_12342.cpp:75: error: `d' undeclared (first use this function)
0_0_10779984_12342.cpp:77: error: `dfs' undeclared (first use this function)
0_0_10779984_12342.cpp:83: error: `res' undeclared (first use this function)