[개발일지] - 789(주말출근)

(1).백준 31822번 재수강은

 

const input = `000200D-18
5
000200D-18
000200C-01
000210D-18
660820A-01
0002000-00`.split('\n').map(el => el.slice(0,5))

let count = 0

for(let i = 2 ; i < input.length ; i++){
    if(input[0] == input[i]){
        count++
    }
}

console.log(count)