const rl = require('readline').createInterface({input: process.stdin})
const iter = rl[Symbol.asyncIterator]()
const readline = async () => (await iter.next()).value

void async function () {
    const K = Number(await readline())
    if (K >= 0 && K <= 10e5) {
        const C = K - 273.15
        const F = C * 1.8 + 32
        console.log(F)
    } else {
        console.log('输入数字不符合范围内')
    }

    rl.close()
}()