View Compilation Error

0_0_17800309_11784.c: In function 'main':
0_0_17800309_11784.c:4:5: error: unknown type name '_int64'
     _int64 x[33];
     ^
0_0_17800309_11784.c:5:5: error: unknown type name '_int64'
     _int64 y[33];
     ^
0_0_17800309_11784.c:16:23: error: 'n' undeclared (first use in this function)
     while(scanf("%d",&n)&&n!=-1)
                       ^
0_0_17800309_11784.c:16:23: note: each undeclared identifier is reported only once for each function it appears in