#include <stdio.h>
int main(void) {
// scan data
long long a,x,y;
scanf("%lld%lld%lld",&a
,&x
,&y
);
//process data
long long hours,minutes;
hours=a/60;
minutes=a%60;
long long money;
money=hours*x+minutes*y;
return 0;
}
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