Submission #1116698

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Source Code Expand

#include <iostream>
#include <string>
using namespace std;

int dx[] = {0,0,1,1},dy[] = {0,1,0,1};

int main(){
	int n;
	bool ani[100000];
	string s;
	cin >> n >> s;
	for(int i = 0;i < 4;i++){
		ani[0] = dx[i];
		ani[1] = dy[i];
		for(int j = 1;j < n - 1;j++){
			if(ani[j] && s[j] == 'o') ani[j + 1] = ani[j - 1];
			else if(ani[j] && s[j] == 'x') ani[j + 1] = !ani[j - 1];
			else if(!ani[j] && s[j] == 'o') ani[j + 1] = !ani[j - 1];
			else ani[j + 1] = ani[j - 1];
		}
		bool f = true;
		if(s[n - 1] == 'o'){
			if((ani[n - 1] && ani[n - 2] != ani[0]) || (!ani[n - 1] && ani[n - 2] == ani[0])) f = false;
		}else{
			if((ani[n - 1] && ani[n - 2] == ani[0]) || (!ani[n - 1] && ani[n - 2] != ani[0])) f = false;
		}
		if(s[0] == 'o'){
			if((ani[0] && ani[n - 1] != ani[1]) || (!ani[0] && ani[n - 1] == ani[1])) f = false;
		}else{
			if((ani[0] && ani[n - 1] == ani[1]) || (!ani[0] && ani[n - 1] != ani[1])) f = false;
		}
		if(f){
			for(int i = 0;i < n;i++){
				if(ani[i]) cout << "S";
				else cout << "W";
			}
			cout << endl;
			return 0;
		}
	}
	cout << -1 << endl;
	return 0;
}

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