Submission #507306

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Source Code Expand

using System;
using System.Collections.Generic;
using System.Linq;
using System.IO;
using System.Text;
using System.Numerics;
using System.Globalization;

namespace Solver
{
    class Program
    {
        const int M = 1000000007;
        const double eps = 1e-9;
        static void Main()
        {
            var sw = new System.IO.StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false };
            var sc = new Scan();
            var s = sc.Str;
            var n = s.Length;
            bool prew = true;
            int ci = 0, cw = 0;
            int ans = 0;
            for (int i = 0; i < n; i++)
            {
                if (s[i] == 'w')
                {
                    if (prew)
                    {
                        ans += Math.Max(0, Math.Min(ci / 2, (cw - 1)));
                        ci = 0;
                        cw = 0;
                    }
                    else
                    {
                        ++cw;
                        prew = true;
                    }
                }
                else
                {
                    prew = false;
                    ++ci;
                }
            }
            if (prew)
                ans += Math.Max(0, Math.Min(ci / 2, (cw - 1)));
            else
                ans += Math.Min(ci / 2, cw);

            sw.WriteLine(ans);
            sw.Flush();
        }
    }
    class Scan
    {
        public int Int { get { return int.Parse(Console.ReadLine().Trim()); } }
        public long Long { get { return long.Parse(Console.ReadLine().Trim()); } }
        public string Str { get { return Console.ReadLine().Trim(); } }
        public int[] IntArr { get { return Console.ReadLine().Trim().Split().Select(int.Parse).ToArray(); } }
        public int[] IntArrWithSep(char sep) { return Console.ReadLine().Trim().Split(sep).Select(int.Parse).ToArray(); }
        public long[] LongArr { get { return Console.ReadLine().Trim().Split().Select(long.Parse).ToArray(); } }
        public double[] DoubleArr { get { return Console.ReadLine().Split().Select(double.Parse).ToArray(); } }
        public string[] StrArr { get { return Console.ReadLine().Trim().Split(); } }
        public List<int> IntList { get { return Console.ReadLine().Trim().Split().Select(int.Parse).ToList(); } }
        public List<long> LongList { get { return Console.ReadLine().Trim().Split().Select(long.Parse).ToList(); } }
        public void Multi(out int a, out int b) { var arr = IntArr; a = arr[0]; b = arr[1]; }
        public void Multi(out int a, out int b, out int c) { var arr = IntArr; a = arr[0]; b = arr[1]; c = arr[2]; }
        public void Multi(out int a, out int b, out int c, out int d) { var arr = IntArr; a = arr[0]; b = arr[1]; c = arr[2]; d = arr[3]; }
        public void Multi(out int a, out string b) { var arr = StrArr; a = int.Parse(arr[0]); b = arr[1]; }
        public void Multi(out int a, out int b, out string c) { var arr = StrArr; a = int.Parse(arr[0]); b = int.Parse(arr[1]); c = arr[2]; }
        public void Multi(out int a, out char b) { var arr = StrArr; a = int.Parse(arr[0]); b = arr[1][0]; }
        public void Multi(out long a, out long b) { var arr = LongArr; a = arr[0]; b = arr[1]; }
        public void Multi(out long a, out int b) { var arr = LongArr; a = arr[0]; b = (int)arr[1]; }
        public void Multi(out string a, out string b) { var arr = StrArr; a = arr[0]; b = arr[1]; }
    }
    class _math
    {
        const int M = 1000000007;
        const double eps = 1e-9;
        public long pow(long a, long b)
        {
            if (b == 0) return 1;
            if (b == 1) return a % M;
            
            long t = pow(a, b / 2);

            if ((b & 1) == 0) return t * t % M;
            else return t * t % M * a % M;
        }
    }
}

Submission Info

Judge Result