# My simple cpp solution

• ``````class Solution {
public:
string intToRoman(int num)
{
string res;
string sym[] = {"M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"};
int val[] = {1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1};

for(int i=0; num != 0; i++)
{
while(num >= val[i])
{
num -= val[i];
res += sym[i];
}
}

return res;
}
};``````

• class Solution {
public:
string intToRoman(int num) {

``````    // Making the first 3 arrays char* rather than string reduces runtime from 36 to 32 ms
static char* ones[10] =     { "", "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX" };
static char* tens[10] =     { "", "X", "XX", "XXX", "XL", "L", "LX", "LXX", "LXXX", "XC" };
static char* hundreds[10] = { "", "C", "CC", "CCC", "CD", "D", "DC", "DCC", "DCCC", "CM" };
static string thousands[4] = { "", "M", "MM", "MMM" };

int th = num/1000;
num -= th*1000;
int h = num/100;
num -= h*100;
int t = num/10;
int o = num - t*10;

return thousands[th]+hundreds[h]+tens[t]+ones[o];
}
``````

};

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