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solution.cpp
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solution.cpp
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#include <string>
class Solution {
public:
std::string intToRoman(int num) {
std::string s = "";
while (num >= 1000) {
s += "M";
num -= 1000;
}
if (num >= 900) {
s += "CM";
num -= 900;
} else if (num >= 600) {
s += "D";
while (num >= 600) {
s += "C";
num -= 100;
}
num -= 500;
} else if (num >= 500) {
s += "D";
num -= 500;
} else if (num >= 400) {
s += "CD";
num -= 400;
} else {
while (num >= 100) {
s += "C";
num -= 100;
}
}
if (num >= 90) {
s += "XC";
num -= 90;
} else if (num >= 60) {
s += "L";
while (num >= 60) {
s += "X";
num -= 10;
}
num -= 50;
} else if (num >= 50) {
s += "L";
num -= 50;
} else if (num >= 40) {
s += "XL";
num -= 40;
} else {
while (num >= 10) {
s += "X";
num -= 10;
}
}
if (num >= 9) {
s += "IX";
num -= 9;
} else if (num >= 6) {
s += "V";
while (num >= 6) {
s += "I";
num -= 1;
}
num -= 5;
} else if (num >= 5) {
s += "V";
num -= 5;
} else if (num >= 4) {
s += "IV";
num -= 4;
} else {
while (num >= 1) {
s += "I";
num -= 1;
}
}
return s;
}
};