11070 - The Good Old Times

[Ashkankhan]

[lord_burgos]

input:
100
-10+2+2
Correct output
100.000
-6.000
your output is
0.000
4.000

[arsalan_mousavian]

during the contest i've got several CE on this problem , and when i checked my mail, it was written No Such a File or Directory but after contest i submit it without any changes and i got AC , can somebody tell me why this happens? because it was very awful during the contest

[shanto86]

well if any one gets WA then u may try with these:

Code: Select all

--9
-1-1+9/3
---9
-9--+-9

i was having trouble with multiple unary oparators

[ivan.cu]

My output for this:
2*-0.5+-0.5*3+-15.5
1/2/2
-3.0
3
4.0+3.0/5.0
1*2*3+1+1*2+1*2*3*4
--9
-1-1+9/3
---9
-9--+-9
100
-10+2+2

is

-18.000
0.250
-3.000
3.000
4.600
33.000
9.000
1.000
-9.000
-18.000
100.000
-6.000

it this correct?

Please some one can help me?

[Martin Macko]

it this correct?

Yes, it is.

[Martin Macko]

Ashkankhan, could you, please, change the subject of this topic, so it would contain the number of this problem (i.e., 11070) instead of the number 11079? I think many people would appreciate it.

[shahriar_manzoor]

"No input file" is a bug of the judge. So try submitting again and again if you get this error.

[shanto86]

talking about the error, yesterday i faced a new thing, judge accepted code till 5:00:59. why so? i got last ac at 5:00:02. so today i checked the status page and i c that judge evaluated till 5:00:53

http://online-judge.uva.es/contest/stat ... =2128&r=60

[trulo17]

i guess most of the input given here don't appear in judge's input, i got ac withouth considering such cases(in fact, i consider unary operators will appear only at th beginning of a line, after all expresions like 5*-2 doesn't make sense)

[ivan.cu]

I don't understand why i have a WA, some one can give me an email for send my WA code in Java?

[Martin Macko]

i guess most of the input given here don't appear in judge's input, i got ac withouth considering such cases(in fact, i consider unary operators will appear only at th beginning of a line, after all expresions like 5*-2 doesn't make sense)

How does the expresion '5*-2' make no sense? I don't understand.

[trulo17]

you're right martin, i was wrong saying that, anyway those cases dont appear in the input(ohterwise i would get wrong answer)

[ivan.cu]

Code: Select all

//import java.io.FileInputStream;
//import java.io.FileNotFoundException;

class Main {
	public static void main(String[] args) {
//		try {
//			System.setIn(new FileInputStream("input.txt"));
//		} catch (FileNotFoundException e1) {
//		}
		boolean end = false;
		String n = "";
		try {
			n = Consola.readLine();
		} catch (Exception e) {
			end = true;
		}
		Main m = new Main();
		while (!end) {
			System.out.println(m.doIt(n));
			try {
				n = Consola.readLine();
			} catch (Exception e) {
				end = true;
			}
		}
	}
	private String doIt(String c) {
		Expr t = new Expr(c);
		return format("" + t.eval());
	}
	private String format(String a) {
		String r = "";
		int i = 0, l = a.length();
		boolean decimal = false;
		while (i < l) {
			r += a.charAt(i);
			if (a.charAt(i) == '.' || a.charAt(i) == ',') {
				
				decimal = true;
				if (i + 1 < l)
					r += a.charAt(i + 1);
				else
					r += "0";

				if (i + 2 < l)
					r += a.charAt(i + 2);
				else
					r += "0";

				if (i + 3 < l)
					r += a.charAt(i + 3);
				else
					r += "0";

				break;
			}
			i++;
		}
		if (!decimal)
			r += ".000";
		return r;
	}
}

class Expr {
	char o;

	double v;

	Expr r, d;

	public double valueOf(String n) {
		int l = n.length();
		int i = 0;
		int a = 0;
		int d = 0;
		int cd = 1;
		boolean dc = false;
		while (i < l) {
			if (n.charAt(i) == '.') {

				dc = true;
			} else {
				if (dc) {
					a = a * 10 + (n.charAt(i) - '0');
					cd *= 10;
				} else {
					d = d * 10 + (n.charAt(i) - '0');
				}
			}

			i++;
		}

		if (dc)
			return 1.0d * d + 1.0 * a / cd;
		else
			return 1.0d * d;
	}

	public Expr(String c) {
			int i = c.length() - 1;

			while (i >= 0 && c.charAt(i) != '+' && c.charAt(i) != '-') {
				i--;

				do {
					i--;
				} while (i >= 0
						&& (c.charAt(i) == '+' || c.charAt(i) == '-'
								|| c.charAt(i) == '*' || c.charAt(i) == '/'));

				i++;
			}

			if (i > 0 && (c.charAt(i) == '+' || c.charAt(i) == '-')) {
				o = c.charAt(i);
				r = new Expr(c.substring(0, i));
				d = new Expr(c.substring(i + 1));
			} else {
				i = c.length() - 1;

				while (i >= 0 && c.charAt(i) != '*' && c.charAt(i) != '/')
					i--;

				if (i >= 0 && (c.charAt(i) == '*' || c.charAt(i) == '/')) {
					o = c.charAt(i);
					r = new Expr(c.substring(0, i));
					d = new Expr(c.substring(i + 1));
				} else {
					o = 'v';
					char in = c.charAt(0);
					int p = 1;
					while (in == '-' || in == '+') {
						c = c.substring(1);
						p *= in == '-' ? -1 : 1;
						in = c.charAt(0);
					}

					v = p * Double.valueOf(c).doubleValue();
				}
			}
	}

	public double eval() {
		switch (o) {
		case 'v':
			return v;
		case '+':{
			double aa = r.eval();
			double bb = d.eval();
			return aa + bb;
			}
		case '-':
			return r.eval() - d.eval();
		case '*':
			return r.eval() * d.eval();
		case '/':
			return r.eval() / d.eval();
		}
		return -1;
	}
}

class Consola {
	private static int maxLongitud = 256;
	private static byte[] lin = new byte[maxLongitud];
	public static String readLine() throws Exception {
		int lg = 0, car = -1;
		try {
			while (true) {
				car = System.in.read();
				if ((car < 0 && lg == 0)
						|| ((car < 0) || (car == '\r') || (car == '\n'))
						&& lg != 0) {
					break;
				} else if (!((car < 0) || (car == '\r') || (car == '\n'))) {
					lin[lg++] = (byte) car;
				}
			}
		} catch (Exception e) {
			throw (null);
		}
		if ((car < 0) && (lg == 0))
			throw (null); // eof
		return (new String(lin, 0, lg));
	}
	public static String readWord() throws Exception {
		int lg = 0, car = -1;
		try {
			while (true) {
				car = System.in.read();
				if ((car < 0 && lg == 0) || (car <= 32 && lg != 0)) {
					break;
				} else if (!(car <= 32)) {
					lin[lg++] = (byte) car;
				}
			}
		} catch (Exception e) {
			throw null;
		}
		if ((car < 0) && (lg == 0)) {
			throw null; // eof
		}
		lin[lg] = '\0';
		return (new String(lin, 0, lg));
	}
	public static int readInt() throws Exception {
		String read = readWord();
		if (read.equals(null)) {
			throw null;
		}
		return Integer.parseInt(read);
	}
}

[Martin Macko]

Code: Select all

//import java.io.FileInputStream;
//import java.io.FileNotFoundException;

...

Try:

Code: Select all

-10*0

The correct output:

Code: Select all

0.000

Your output:

Code: Select all

-0.000