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let r = ["I", "V", "X", "L", "C", "D", "M"];
let v = [1, 5, 10, 50, 100, 500, 1000];
function roman(c) {
for (let i = 0; i < r.length; i++)
if (r[i] == c)
return v[i];
}
let basic = [ "IIII", "VIIII", "XXXX", "LXXXX", "CCCC", "DCCCC" ];
let modern = [ "IV", "IX", "XL", "XC", "CD", "CM" ];
function convert_from_roman(s) {
console.log("Input:",s);
for (let i = 0; i < basic.length; i++) {
let key = modern[i];
let val = basic[i];
s = s.replace(key, val);
}
let sum = 0;
for (let c of s)
sum += roman(c);
console.log("Output:", sum);
}
function convert_to_roman(num) {
console.log("Input:", num);
let ans = "";
let stack = [];
for (let i = 0; i < r.length; i++)
if (num >= v[i])
stack.push(v[i]);
let i = stack.length - 1
while (i >= 0) {
let x = stack.pop();
let d = Math.floor(num/x);
for (let j = 0; j < d; j++)
ans += r[i];
num -= d*x;
i -= 1;
}
for (let j = 0; j < basic.length; j++) {
key = basic[basic.length - 1 - j];
val = modern[basic.length - 1 - j];
ans = ans.replace(key, val);
}
console.log("Output:", ans);
}
convert_from_roman("CCXLVI");
convert_to_roman(39);
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