問題

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typescript

typescript

function romanToInt(s: string): number {
    const romanIntMap = {
        I: 1,
        V: 5,
        X: 10,
        L: 50,
        C: 100,
        D: 500,
        M: 1000,
    }
    let n = 0
    for(let i = 0; i < s.length; i++) {
        if(i+1 < s.length && romanIntMap[s[i]] < romanIntMap[s[i+1]]){
            n -= romanIntMap[s[i]]
        } else{
            n += romanIntMap[s[i]]
        }
    }
    return n
};

• carryで繰り上がりをうまく渡していく
• current3 = dummyはよく使う