#include
<stdio
.h
>
#include
<string
.h
>
#include
<ctype
.h
>
char s
[10000];
float
value(char x
){
if(x
=='C')
return 12.01;
else if(x
=='H')
return 1.008;
else if(x
=='O')
return 16.00;
else
return 14.01;
}
int
main(){
scanf("%s",s
);
int n
=strlen(s
);
float sum
=0.0;
char x
=s
[0];
for(int i
=1;i
<n
;i
++){
if(isdigit(s
[i
])){
sum
+=value(x
)*(s
[i
]-'0');
}
else{
if(!isdigit(x
)){
sum
+=value(x
);
}
}
x
=s
[i
];
}
if(!isdigit(x
))
sum
+=value(x
);
printf("%.3f\n",sum
);
return 0;
}
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