poj 2583 Series Determination

#include <iostream>using namespace std;int A, B, C;void initP(int f0, int f1, int f2){    C = f0;    B = (4 * f1 - 3 * C - f2) / 2;    A = (f2 - 2 * f1 + C) / 2;}int main(int argc, char const *argv[]){    int f0, f1, f2;    while (cin >> f0 >> f1 >> f2)    {        initP(f0, f1, f2);        cout << A * 9 + B * 3 + C << " " << A * 16 + B * 4 + C << " " << A * 25 + B * 5 + C << endl;    }    return 0;}