POJ 3299

#include <iostream>
#include "math.h"

double e2h(double e)
{
    return 0.5555*(e-10.0);
}

double D2e(double D)
{
    return 6.11*exp(5417.7530*((1/273.16)-(1/(D+273.16))));
}

double e2D(double e)
{
    return (1/(1/273.16-log(e/6.11)/5417.7530))-273.16;
}

int main() {
    double H, D, T, h, e;
    char cmd[5];

    while (scanf("%s", cmd) && cmd[0]!=‘E‘) {
        T = D = H = -99999;

        if(cmd[0]==‘T‘)
            scanf("%lf", &T);
        else if(cmd[0]==‘D‘)
            scanf("%lf", &D);
        else
            scanf("%lf", &H);

        scanf("%s", cmd);

        if(cmd[0]==‘T‘)
            scanf("%lf", &T);

        else if(cmd[0]==‘D‘)
            scanf("%lf", &D);

        else
            scanf("%lf", &H);

        if(D > -9999) {
            h = e2h(D2e(D));
            if(T<-9999)
                T = H-h;
            else
                H = T+h;
        }
        else {
            h = H - T;
            e = h/0.5555 + 10.0;
            D = e2D(e);
        }
        printf("T %.1lf D %.1lf H %.1lf\n", T, D, H);


    }

    return 0;
}