Submission #2243659


Source Code Expand

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
using System.IO;

namespace AtCoder
{
    class Program
    {
        private static string Read() { return Console.ReadLine(); }
        private static int ReadInt() { return int.Parse(Read()); }
        private static long ReadLong() { return long.Parse(Read()); }
        private static double ReadDouble() { return double.Parse(Read()); }
        private static int[] ReadInts() { return Array.ConvertAll(Read().Split(), int.Parse); }
        private static long[] ReadLongs() { return Array.ConvertAll(Read().Split(), long.Parse); }
        private static double[] ReadDoubles() { return Array.ConvertAll(Read().Split(), double.Parse); }

        static int Solve(int N, int[] P)
        {
            int count = 0;
            for (int i = 0; i < N; ++i)
            {
                if (P[i] == i + 1)
                {
                    if (i + 1 < N)
                    {
                        int tmp = P[i];
                        P[i] = P[i + 1];
                        P[i + 1] = tmp;
                    }
                    ++count;
                }
            }
            return count;
        }

        static void Main(string[] args)
        {
            int N = ReadInt();
            Console.WriteLine(Solve(N, ReadInts()));
        }
    }
}

Submission Info

Submission Time
Task D - Derangement
User M_Saito
Language C# (Mono 4.6.2.0)
Score 400
Code Size 1436 Byte
Status AC
Exec Time 54 ms
Memory 18912 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 400 / 400
Status
AC × 4
AC × 15
Set Name Test Cases
Sample 0_000.txt, 0_001.txt, 0_002.txt, 0_003.txt
All 0_000.txt, 0_001.txt, 0_002.txt, 0_003.txt, 1_004.txt, 1_005.txt, 1_006.txt, 1_007.txt, 1_008.txt, 1_009.txt, 1_010.txt, 1_011.txt, 1_012.txt, 1_013.txt, 1_014.txt
Case Name Status Exec Time Memory
0_000.txt AC 20 ms 11092 KB
0_001.txt AC 20 ms 11092 KB
0_002.txt AC 20 ms 9044 KB
0_003.txt AC 20 ms 11092 KB
1_004.txt AC 20 ms 11092 KB
1_005.txt AC 52 ms 16736 KB
1_006.txt AC 52 ms 14816 KB
1_007.txt AC 53 ms 16864 KB
1_008.txt AC 53 ms 18784 KB
1_009.txt AC 53 ms 18912 KB
1_010.txt AC 52 ms 14816 KB
1_011.txt AC 52 ms 14816 KB
1_012.txt AC 54 ms 18912 KB
1_013.txt AC 52 ms 14816 KB
1_014.txt AC 53 ms 16864 KB