Molar mass UVA - 1586

#include <stdio.h>
#include <ctype.h>

const double C = 12.01;
const double H = 1.008;
const double O = 16.00;
const double N = 14.01;

double molar();
double panduan(char);

int main() {
	int T;
	scanf("%d", &T);
	while (getchar() != '\n')
		continue;
	while (T--) {
		printf("%.3lf\n", molar());
	}
	return 0;
}

double molar() {
	double sum = 0.0, yuanzi = 0.0;
	char c;
	int shi = 0, ge = 0;
	bool flag = false;
	while ((c = getchar()) != '\n') {
		if (isalpha(c)) {
			yuanzi = panduan(c);
			sum += yuanzi;
			flag = true;
		}
		else if (isdigit(c)) {
			if (flag) {
				ge = (c - 49);
				sum += yuanzi * ge;
				flag = false;
			}
			else {
				sum -= yuanzi * ge;
				shi = ge + 1;
				ge = (c - 49);
				sum += yuanzi * (shi*10 + ge);
			}
		}
	}
	return sum;
}

double panduan(char c) {
	if (c == 'C')
		return C;
	else if (c == 'H')
		return H;
	else if (c == 'O')
		return O;
	else
		return N;
}