foo.cc:4:1: error: '__int64' does not name a type; did you mean '__int64_t'?
 __int64 x[61],y[61],z[61];
 ^~~~~~~
 __int64_t
foo.cc: In function 'int main()':
foo.cc:10:1: error: 'x' was not declared in this scope
 x[3]=1;y[3]=-2;z[3]=2;
 ^
foo.cc:10:8: error: 'y' was not declared in this scope
 x[3]=1;y[3]=-2;z[3]=2;
        ^
foo.cc:10:16: error: 'z' was not declared in this scope
 x[3]=1;y[3]=-2;z[3]=2;
                ^
foo.cc:8:6: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 scanf("%d%d",&n,&m);
 ~~~~~^~~~~~~~~~~~~~
foo.cc:9:6: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 scanf("%lf%lf%lf",&d,&a[1],&a[n]);
 ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

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自豪的采用HydroJudge(https://github.com/hydro-dev/Hydro)进行评测。