#includestdio.h
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double?zc(double?x,?double?y){
return?2*(x+y);
}
double?mj(double?x,double?y){
return?x*y;
}
int?main(){
double?x,y;
scanf("%lf%lf",x,y);
printf("%lf?%lf",zc(x,y),mj(x,y));
巧罩getchar();
getchar();
侍旦?return?0;???老寬擾?
}