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Copy pathtempCodeRunnerFile.java
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77 lines (69 loc) · 1.96 KB
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/* package codechef; // don't place package name! */
import java.util.*;
import java.lang.*;
import java.io.*;
/* Name of the class has to be "Main" only if the class is public. */
class RomanToNumber
{
int value(char r)
{
if (r == 'I')
return 1;
if (r == 'V')
return 5;
if (r == 'X')
return 10;
if (r == 'L')
return 50;
if (r == 'C')
return 100;
if (r == 'D')
return 500;
if (r == 'M')
return 1000;
return -1;
}
int romanToDecimal(String str)
{
// Initialize result
int res = 0;
for (int i = 0; i < str.length(); i++)
{
// Getting value of symbol s[i]
int s1 = value(str.charAt(i));
// Getting value of symbol s[i+1]
if (i + 1 < str.length())
{
int s2 = value(str.charAt(i + 1));
// Comparing both values
if (s1 >= s2)
{
// Value of current symbol
// is greater or equalto
// the next symbol
res = res + s1;
}
else
{
// Value of current symbol is
// less than the next symbol
res = res + s2 - s1;
i++;
}
}
else
{
res = res + s1;
}
}
return res;
}
public static void main (String[] args) throws java.lang.Exception
{
RomanToNumber ob = new RomanToNumber();
Scanner s=new Scanner(System.in);
// Considering inputs given are valid
String str = s.nextLine();
System.out.println("Integer form of Roman Numeral" + " is " + ob.romanToDecimal(str));
}
}