const fs = require('fs');
const input = fs.readFileSync('/dev/stdin').toString().trim().split(' ').map(val=>+val)
let [a, b] = input;
const fs = require('fs');
const input = fs.readFileSync('/dev/stdin').toString().split('\n');
let a = parseInt(input[0].split(' ')[0]);
let b = parseInt(input[0].split(' ')[1]);
let c = parseInt(input[1]);
계속 추가중