結果
| 問題 |
No.734 Careful Engineer
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2018-09-28 22:31:52 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
AC
|
| 実行時間 | 31 ms / 2,000 ms |
| コード長 | 2,669 bytes |
| コンパイル時間 | 869 ms |
| コンパイル使用メモリ | 111,240 KB |
| 実行使用メモリ | 19,328 KB |
| 最終ジャッジ日時 | 2025-06-20 00:43:58 |
| 合計ジャッジ時間 | 2,019 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 13 |
コンパイルメッセージ
Microsoft (R) Visual C# Compiler version 3.9.0-6.21124.20 (db94f4cc) Copyright (C) Microsoft Corporation. All rights reserved.
ソースコード
using System;
using System.Collections.Generic;
using System.Linq;
using System.IO;
//using System.Text;
//using System.Text.RegularExpressions;
//using System.Globalization;
//using System.Diagnostics;
using static System.Console;
using System.Numerics;
using static System.Math;
//using pair = Pair<int, int>;
class Program
{
static void Main()
{
//SetOut(new StreamWriter(OpenStandardOutput()) { AutoFlush = false });
new Program().solve();
Out.Flush();
}
Scanner cin = new Scanner();
readonly int[] dd = { 0, 1, 0, -1, 0 }; //→↓←↑
readonly int mod = 1000000007;
void chmax<T>(ref T a, T b) where T : IComparable<T> { a = a.CompareTo(b) < 0 ? b : a; }
void chmin<T>(ref T a, T b) where T : IComparable<T> { a = a.CompareTo(b) < 0 ? a : b; }
void solve()
{
BigInteger A = cin.nextlong;
BigInteger B = cin.nextlong;
BigInteger C = cin.nextlong;
A *= (long)60;
C *= (long)60 * 60;
if (A <= B)
{
WriteLine(-1);
}
else
{
//var D = A - B;
//WriteLine((C + D - 1) / D);
//WriteLine(A + " " + B + " " + C);
//WriteLine((A * 131687242800L) + " " + (C + B * 131687242800L));
BigInteger ok = long.MaxValue * (BigInteger)long.MaxValue * 2;
BigInteger ng = 0;
while (ok - ng > 1)
{
var mid = (ok + ng) / 2;
if (A * mid < C + B * mid)
{
ng = mid;
}
else
{
ok = mid;
}
}
WriteLine(ok);
}
}
}
class Scanner
{
string[] s; int i;
char[] cs = new char[] { ' ' };
public Scanner() { s = new string[0]; i = 0; }
public string[] scan { get { return ReadLine().Split(); } }
public int[] scanint { get { return Array.ConvertAll(scan, int.Parse); } }
public long[] scanlong { get { return Array.ConvertAll(scan, long.Parse); } }
public double[] scandouble { get { return Array.ConvertAll(scan, double.Parse); } }
public string next
{
get
{
if (i < s.Length) return s[i++];
string st = ReadLine();
while (st == "") st = ReadLine();
s = st.Split(cs, StringSplitOptions.RemoveEmptyEntries);
i = 0;
return next;
}
}
public int nextint { get { return int.Parse(next); } }
public long nextlong { get { return long.Parse(next); } }
public double nextdouble { get { return double.Parse(next); } }
}