#include
#define PROPORTION 0.6
int main()
{int qm,ps;
float zp;
scanf("%d%d",&qm,&ps);
zp=qm*PROPORTION+ps*(1-PROPORTION);
printf("%.1f\n",zp);
return 0;
}
#include
const float PROPORTION=0.6;
int main()
{int qm,ps;
float zp;
scanf("%d%d",&qm,&ps);
zp=qm*PROPORTION+ps*(1-PROPORTION);
printf("%.1f\n",zp);
return 0;
}
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