UVa 10114 - Loansome Car Buyer * (just simulate the process)

Link:https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=13&page=show_problem&problem=1055
Sol:

#include <iostream>
	#include <vector>
	using namespace std;
	int main() {
	int loanDur, nRec;
	double downPayment, loan, decP[101];
	while (true) {
	cin >> loanDur >> downPayment >> loan >> nRec;
	if (loanDur < 0)
	break;
	int m;
	double p;
	while (nRec--) {
	cin >> m >> p;
	for (int i = m; i < 101; i++)
	decP[i] = p;
	}
	int now = 0;
	double monthlyPayment = loan / loanDur;
	double curVal = (loan + downPayment) * (1 - decP[0]);
	double curLoan = loan;
	while (curVal < curLoan) {
	now++;
	curLoan -= monthlyPayment;
	curVal = curVal * (1-decP[now]);
	}
	cout << now << " month";
	if (now != 1)
	cout << "s";
	cout << endl;
	}
	return 0;
	}