View Compilation Error

0_0_14670057_8927.cpp:3:12: error: '_int64' does not name a type
 #define LL _int64
            ^
0_0_14670057_8927.cpp:8:1: note: in expansion of macro 'LL'
 LL gcd(LL a,LL b)
 ^
0_0_14670057_8927.cpp: In function 'int main()':
0_0_14670057_8927.cpp:3:12: error: '_int64' was not declared in this scope
 #define LL _int64
            ^
0_0_14670057_8927.cpp:31:3: note: in expansion of macro 'LL'
   LL up,down;
   ^
0_0_14670057_8927.cpp:32:3: error: 'up' was not declared in this scope
   up=0;
   ^
0_0_14670057_8927.cpp:33:3: error: 'down' was not declared in this scope
   down=(LL)(m*(m-1)*(m-2)/6);
   ^
0_0_14670057_8927.cpp:43:22: error: 'gcd' was not declared in this scope
   up = up/gcd(up,down);
                      ^