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今日の問題

↑押してください。

自分の回答(javascript)

function Main(input){
    min = 1e18
    max = -1e18
    let abc = "abcdefghijklmnopqrstuvwxyz".split("")
    let ABC = "ABCDEFGHIJKLMNOPQRSTUVWXYZ".split("")
    let f = 2
    if(f == 0){
      input = parseInt(input.trim())
    }
    if(f == 1){
      input = input.trim().split("\n").map((a)=>parseInt(a))
    }
    if(f == 2){
      input = input.trim().split("\n").map((a)=>a.split(" ").map((b)=>parseInt(b)))
    }
    //ここより上は定型文です。
   let n = input.shift()[0]
   now = 0
   count = 0
   for(let i = 1;i<=input[n-1][0];i++){
     if(i == input[count][0]){
       now += input[count][1]
       count ++
     }
     if(now > 0&&i != input[n-1][0]){
     now --
     }
   }
   console.log(now)
  }
  Main(require("fs").readFileSync(0, "utf8"));
  

工夫した点

加湿器がからになる場合を注意しなければいけません。時系列順に進めてときます。

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