Submission #1966023

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Source Code Expand

using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Linq.Expressions;
using System.Runtime.InteropServices;
using System.Runtime.Remoting.Messaging;
using System.Security.Principal;
using System.Text;
class Simple
{
    int N;
    string S;
    void Solve() {
        //input
        N = io.Int;
        S = io.String;
        //cal
        bool ans = false;
        var ring = new string[N];
        Func<string, string> rev = (str) => str == "S" ? "W" : "S";
        Func<string, bool> isHonest = (str) => str == "S";
        Func<char, bool> isSame = (cha) => cha == 'o';
        Action<string> initSame = (str) => ring[1] = ring[N - 1] = str;
        Action<string> initDiff = (str) => ring[1] = rev(ring[N - 1] = str);
        Action<int, string> same = (index, str) => ring[index + 1] = ring[index - 1];
        Action<int, string> diff = (index, str) => ring[index + 1] = rev(ring[index - 1]);
        Action f = () => {
            for (int i = 1; i < N - 1; ++i) {
                if (isHonest(ring[i])) {
                    if (isSame(S[i])) {
                        same(i, ring[i]);
                    } else {
                        diff(i, ring[i]);
                    }
                } else {
                    if (isSame(S[i])) {
                        diff(i, ring[i]);
                    } else {
                        same(i, ring[i]);
                    }
                }
            }
        };
        Func<bool> finIsSame = () => ring[N - 2] == ring[0];
        Func<bool> finIsDiff = () => !finIsSame();
        Func<bool> isValid = () => {
            if (isHonest(ring[N - 1])) {
                if (isSame(S[N - 1])) {
                    return finIsSame();
                } else {
                    return finIsDiff();
                }
            } else {
                if (isSame(S[N - 1])) {
                    return finIsDiff();
                } else {
                    return finIsSame();
                }
            }
        };
        //羊スタート
        //初回        
        ring[0] = "S";
        if (isSame(S[0])) {
            initSame(ring[0]);
        } else {
            initDiff(ring[0]);
        }
        //中間
        f();
        //最終チェック
        if (isValid()) {
            ans = true;
            goto RET;
        }
        //狼スタート
        //初回        
        ring = new string[N];
        ring[0] = "W";
        if (isSame(S[0])) {
            initDiff(ring[0]);
        } else {
            initSame(ring[0]);
        }
        //中間
        f();
        //最終チェック
        if (isValid()) {
            ans = true;
            goto RET;
        }
        
       //ret
       RET:
        if (ans) {
            for (int i = 0; i < N; ++i) {
                Console.Write(ring[i]);
            }
            Console.WriteLine("");
        } else {
            Console.WriteLine(-1);
        }
    }
    SimpleIO io = new SimpleIO();
    public static void Main(string[] args) => new Simple().Stream();
    void Stream() {
        Solve();
        io.writeFlush();
    }
}
class SimpleIO
{
    string[] nextBuffer;
    int BufferCnt;
    char[] cs = new char[] { ' ' };
    StreamWriter sw = new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false };
    public SimpleIO() {
        nextBuffer = new string[0];
        BufferCnt = 0;
        Console.SetOut(sw);
    }
    public string Next() {
        if (BufferCnt < nextBuffer.Length) return nextBuffer[BufferCnt++];
        string st = Console.ReadLine();
        while (st == "") st = Console.ReadLine();
        nextBuffer = st.Split(cs, StringSplitOptions.RemoveEmptyEntries);
        BufferCnt = 0;
        return nextBuffer[BufferCnt++];
    }
    public string String => Next();
    public char Char => char.Parse(String);
    public int Int => int.Parse(String);
    public long Long => long.Parse(String);
    public double Double => double.Parse(String);
    public void writeFlush() { Console.Out.Flush(); }
}

Submission Info

Judge Result