criyle/codenet-compile-errors huggingface dataset:
Language: C++

#include<iostream>
#include<string>
#include<vector>
#include<iomanip>
#include<algorithm>
#include<queue>
#include<stack>
#include<list>
#include<map>
#include<deque>
#include<math.h>
using namespace std;
#define ll long long
int main(){
    ll N;
    cin >> N;
    string s,t;
    cin >> s;
    t.resize(N);
    ll i,j;
    t[0]='S';
    t[1]='S';
    for(i=0;i<4;i++){
        if(i==0){t[0]='S';t[1]='S';}
        if(i==1){t[0]='S';t[1]='W';}
        if(i==2){t[0]='W';t[1]='S';}
        if(i==3){t[0]='W';t[1]='W';}
        for(j=1;j<N-1;j++){
            if((t[j]=='S'&&s[j]=='o')||(t[j]=='W'&&s[j]=='x'))t[j+1]=t[j-1];
            if((t[j]=='W'&&s[j]=='o')||(t[j]=='S'&&s[j]=='x'))t[j+1]=((t[j-1]=='S')?'W':'S');
        }
        ll flag1=0,flag2=0;
        if((t[N-1]=='S'&&s[N-1]=='o')||(t[N-1]=='W'&&s[N-1]=='x')){
            if(t[0]==t[N-2])flag1=1;
        }
        if((t[N-1]=='W'&&s[N-1]=='o')||(t[N-1]=='S'&&s[N-1]=='x')){
             if(t[0]!=t[N-2])flag1=1;
        }
        if((t[0]=='S'&&s[0]=='o')||(t[0]=='W'&&s[0]=='x')){
            if(t[N-1]==t[1])flag2=1;
        }
        if((t[0]=='W'&&s[0]=='o')||(t[0]=='S'&&s[0]=='x')){
             if(t[N-1]!=t[1])flag2=1;
        }
        if(flag1&&flag2){cout << t << endl;return 0}
    }
    cout << -1;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:45:52: error: expected ';' before '}' token
   45 |         if(flag1&&flag2){cout << t << endl;return 0}
      |                                                    ^
      |                                                    ;
Language: C++

#include<iostream>
#include<string>
#include<vector>
#include<iomanip>
#include<algorithm>
#include<queue>
#include<stack>
#include<list>
#include<map>
#include<deque>
#include<math.h>
using namespace std;
#define ll long long
int main(){
    ll N;
    cin >> N;
    string s,t;
    cin >> s;
    t.resize(N);
    ll i,j;
    t[0]='S';
    t[1]='S';
    for(i=0;i<4;i++){
        if(i==0){t[0]='S';t[1]='S';}
        if(i==1){t[0]='S';t[1]='W';}
        if(i==2){t[0]='W';t[1]='S';}
        if(i==3){t[0]='W';t[1]='W';}
        for(j=1;j<N-1;j++){
            if((t[j]=='S'&&s[j]=='o')||(t[j]=='W'&&s[j]=='x'))t[j+1]=t[j-1];
            if((t[j]=='W'&&s[j]=='o')||(t[j]=='S'&&s[j]=='x'))t[j+1]=((t[j-1]=='S')?'W':'S');
        }
        ll flag1=0,flag2=0;
        if((t[N-1]=='S'&&s[N-1]=='o')||(t[N-1]=='W'&&s[N-1]=='x')){
            if(t[0]==t[N-2])flag1=1:
        }
        if((t[N-1]=='W'&&s[N-1]=='o')||(t[N-1]=='S'&&s[N-1]=='x')){
             if(t[0]!=t[N-2])flag1=1;
        }
        if((t[0]=='S'&&s[0]=='o')||(t[0]=='W'&&s[0]=='x')){
            if(t[N-1]==t[1])flag2=1;
        }
        if((t[0]=='W'&&s[0]=='o')||(t[0]=='S'&&s[0]=='x')){
             if(t[N-1]!=t[0])flag2=1;
        }
        if(flag1&&flag2){cout << t << endl;}
    }
    cout << -1;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:34:36: error: expected ';' before ':' token
   34 |             if(t[0]==t[N-2])flag1=1:
      |                                    ^
      |                                    ;
Language: C++

#include<iostream>
#include<string>
#include<vector>
#include<iomanip>
#include<algorithm>
#include<queue>
#include<stack>
#include<list>
#include<map>
#include<deque>
#include<math.h>
using namespace std;
#define ll long long
int main(){
    ll N;
    cin >> N;
    string s,t;
    cin >> s;
    t.resize(N);
    ll i,j;
    t[0]='S';
    t[1]='S';
    for(i=0;i<4;i++){
        if(i==0){t[0]='S';t[1]='S';}
        if(i==1){t[0]='S';t[1]='W';}
        if(i==2){t[0]='W';t[1]='S';}
        if(i==3){t[0]='W';t[1]='W';}
        for(j=1;j<N-1;j++){
            if((t[j]=='S'&&s[j]=='o')||(t[j]=='W'&&s[j]=='x'))t[j+1]=t[j-1];
            if((t[j]=='W'&&s[j]=='o')||(t[j]=='S'&&s[j]=='x'))t[j+1]=((t[j-1]=='S')?'W':'S');
        }
        ll flag1=0,flag2=0;
        if((t[N-1]=='S'&&s[N-1]=='o')||(t[N-1]=='W'&&s[N-1]=='x')){
            if(t[0]==t[N-2])flag1=1:
        }
        if((t[N-1]=='W'&&s[N-1]=='o')||(t[N-1]=='S'&&s[N-1]=='x')){
             if(t[0]!=t[N-2])flag1=1;
        }
        if((t[0]=='S'&&s[0]=='o')||(t[0]=='W'&&s[0]=='x')){
            if(t[N-1]==t[1])flag2=1:
        }
        if((t[0]=='W'&&s[0]=='o')||(t[0]=='S'&&s[0]=='x')){
             if(t[N-1]!=t[0])flag2=1;
        }
        if(flag1&&flag2){cout << t << endl}
    }
    cout << -1;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:34:36: error: expected ';' before ':' token
   34 |             if(t[0]==t[N-2])flag1=1:
      |                                    ^
      |                                    ;
a.cc:40:36: error: expected ';' before ':' token
   40 |             if(t[N-1]==t[1])flag2=1:
      |                                    ^
      |                                    ;
a.cc:45:43: error: expected ';' before '}' token
   45 |         if(flag1&&flag2){cout << t << endl}
      |                                           ^
      |                                           ;
Language: C++


#include <stdio.h>
#include <string.h>
#include <limits.h>
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <map>
#include <set>

typedef unsigned long long ULLONG;
typedef long long LLONG;
static const LLONG MOD_NUM = 1000000007;

template <class _T> static _T tp_abs(const _T& a) {
	//	usage:  tp_abs<type name>(a);
	return ((a < 0) ? (a * -1) : a);
}
template <class _T> static _T tp_min(_T a, _T b) {
	return a < b ? a : b;
}
template <class _T> static _T tp_max(_T a, _T b) {
	return a > b ? a : b;
}
template<class _T> static void get1int(_T& a) {
	const char* fmt = " %d";
	if (sizeof(_T) == sizeof(long long)) {
		fmt = " %lld";
	}

	if (scanf(fmt, &a) < 0) {
		printf("g1int Error\n");
	}
}
template<class _T> static void get2int(_T& a, _T& b) {
	const char* fmt = " %d %d";
	if (sizeof(_T) == sizeof(long long)) {
		fmt = " %lld %lld";
	}

	if (scanf(fmt, &a, &b) < 0) {
		printf("g2int Error\n");
	}
}

static void ARC069D_Menagerie();

#if 1
int main()
{
	ARC069D_Menagerie();
	fflush(stdout);
	return 0;
}
#endif

static void ARC069D_Menagerie()
{
	int N;
	get1int(N);

	auto seq = new char[N + 1];
	getstring(seq);
	auto ans = new char[N + 1];
	ans[N] = 0;

	const char* first = "SSWW";
	const char* second = "SWSW";
	bool success = true;
	for (int i = 0; i < 4; i++) {
		ans[0] = first[i];
		ans[1] = second[i];

		for (int j = 1; j < (N - 1); j++) {
			int next = j + 1;
			int bfr = j - 1;

			if (ans[j] == 'S') {
				if (seq[j] == 'o') {
					ans[next] = ans[bfr];
				}
				else {
					if (ans[bfr] == 'S') ans[next] = 'W';
					else ans[next] = 'S';
				}
			}
			else {
				if (seq[j] == 'o') {
					if (ans[bfr] == 'S') ans[next] = 'W';
					else ans[next] = 'S';
				}
				else {
					ans[next] = ans[bfr];
				}
			}
		}

		success = true;
		for (int j = 0; j < N; j++) {
			int next = j + 1;
			int bfr = j - 1;
			if (next >= N) next = 0;
			if (bfr < 0) bfr = N - 1;

			if (ans[j] == 'S') {
				if (seq[j] == 'o') {
					if (ans[bfr] != ans[next]) {
						success = false;
						break;
					}
				}
				else {
					if (ans[bfr] == ans[next]) {
						success = false;
						break;
					}
				}
			}
			else {
				if (seq[j] == 'o') {
					if (ans[bfr] == ans[next]) {
						success = false;
						break;
					}
				}
				else {
					if (ans[bfr] != ans[next]) {
						success = false;
						break;
					}
				}
			}
		}
		if (success) break;
	}
	if (success) printf("%s\n", ans);
	else printf("-1\n");

	delete[] seq;
	delete[] ans;
}


Compiler output:
a.cc: In function 'void ARC069D_Menagerie()':
a.cc:64:9: error: 'getstring' was not declared in this scope
   64 |         getstring(seq);
      |         ^~~~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
char p[100011];
int s[100011],q[100011],n;
int main()
{
	cin >>n;
	cin >>p;
	for(i=0;p[i];i++)
	{
		if(p[i]=='o')
		q[i+1]=0;
		else
		q[i+1]=1;
	}
	p[n+1]=p[1];
	for(int i=0;i<8;i++)
	{
		s[0]=i&1;
		s[1]=(i>>1)&1;
		s[2]=(i>>2)&1;
		for(int j=2;j<=n+1;j++)
		s[j+1]=s[j-2]^q[j];
		if(s[0]^s[n]^s[i]^s[n+1]||s[1]^s[n+1]^s[2]^s[n+2])
		continue;
		for(int j=1;j<=n;j++)
		cout <<(s[j]^s[j-1]?"W":"S");
		cout <<endl;
		return 0;
	}
	puts("-1");
	return 0;
}























































































































































































































































Compiler output:
a.cc: In function 'int main()':
a.cc:9:13: error: 'i' was not declared in this scope
    9 |         for(i=0;p[i];i++)
      |             ^
Language: C++

#include <Bits/stdc++.h>
using namespace std;
int a[10000011];
int main()
{
	int n;
	string s;
	cin >>n>>s;
	s=s+s;
	for(int i=0;i<2;i++)
	for(int j=0;j<2;j++)
	{
		a[0]=i;
		a[1]=j;
		for(int l=2;l<n+2;l++)
		{
			if(s[l-1]=='o'&&a[l-1]==0)
			a[l]=1-a[l-2];
			if(s[l-1]=='o'&&a[l-1]==1)
			a[l]=a[l-2];
			if(s[l-1]=='x'&&a[l-1]==0)
			a[l]=a[l-2];
			if(s[l-1]=='x'&&a[l-1]==1)
			a[l]=1-a[l-2];
		}
		for(int i=0;i<n;i++)
		cout <<(a[i]?"S":"W");
		return 0;
	}
	puts("-1");
	return 0;
}

Compiler output:
a.cc:1:10: fatal error: Bits/stdc++.h: No such file or directory
    1 | #include <Bits/stdc++.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include <Bits/stdc++.h>
using namespace std;
int a[100000011];
int main()
{
	int n;
	string s;
	cin >>n>>s;
	s=s+s;
	for(int i=0;i<2;i++)
	for(int j=0;j<2;j++)
	{
		a[0]=i;
		a[1]=j;
		for(int l=2;l<n+2;l++)
		{
			if(s[l-1]=='o'&&a[l-1]==0)
			a[l]=1-a[l-2];
			if(s[l-1]=='o'&&a[l-1]==1)
			a[l]=a[l-2];
			if(s[l-1]=='x'&&a[l-1]==0)
			a[l]=a[l-2];
			if(s[l-1]=='x'&&a[l-1]==1)
			a[l]=1-a[l-2];
		}
		if(a[n]==a[0]&&a[n+1]==a[1])
		{
			for(int i=0;i<n;i++)
			cout <<(a[i]?"S":"W");
			return 0;
		}
	}
	puts("-1");
	return 0;
}

Compiler output:
a.cc:1:10: fatal error: Bits/stdc++.h: No such file or directory
    1 | #include <Bits/stdc++.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int (i)=0;(i)<(n);(i)++)
#define pp pair<int,int>
#define ll long long
#define ld long double
int inf=100000000;
ll INF=4000000000000000000;
ll MOD=1000000007;



int main() {
  int n;
  string s;
  cin >> n >> s;
  rep(j,4){
    vector<int> a(n);
    a.at(0)=j/2;
    a.at(1)=j%2;
    int c;
    if (s.at(1)=='o') {c=(a.at(0)+a.at(1))%2;}
    else c=(a.at(0)+1-a.at(1))%2;
  for (int i=2;i<n-1;i++){
    a.at(i)=c;
    if (s.at(i)=='o') {c=(a.at(i-1)+a.at(i))%2;}
    else c=(a.at(i-1)+1-a.at(i))%2;
  }
  a.at(n-1)=c;
  if (s.at(n-1)=='o') {
    if ((a.at(n-2)+a.at(n-1))%2!=a.at(0)) continue;
  }
  else if ((a.at(n-2)+1-a.at(n-1))%2!=a.at(0)) continue;
  string u;
  rep(i,n){
    if (a.at(i)==0) u.push_back('S');
    else u.push_back('W');
  }
  sout << u << endl;
  return 0;
  }
  cout << -1 << endl;
  }

Compiler output:
a.cc: In function 'int main()':
a.cc:39:3: error: 'sout' was not declared in this scope; did you mean 'stdout'?
   39 |   sout << u << endl;
      |   ^~~~
      |   stdout
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main() {
    int N;
    string S;
    cin >> N >> S;

    vector<string> start = {"SS", "SW", "WS", "WW"};

    for(auto st : start) {
        string A(N, 'a');
        A.at(0) = st.at(0);
        A.at(1) = st.at(1);
        for(int i = 2; i < N; i++) {
            // oS -> SSS WSW
            if(S.at(i - 1) == 'o' && A.at(i - 1) == 'S') {
                A.at(i) = A.at(i - 2);
            } else if(S.at(i - 1) == 'x' && A.at(i - 1) == 'W') {
                A.at(i) = A.at(i - 2);
            } else {
                A.at(i) = (A.at(i - 2) == 'W') ? 'S' : 'W';
            }
        }
        bool a1 = (A.at(N - 1) == 'S');
        bool a2 = (S.at(N - 1) == 'o');
        bool a3 = (A.at(N - 2) == A.at(0));
        if((int(a1 + a2 + a3) % 2) == 0)
            continue;
        bool a1 = (A.at(0) == 'S');
        bool a2 = (S.at(0) == 'o');
        bool a3 = (A.at(N - 1) == A.at(1));

        if(int(a1 + a2 + a3) % 2) {
            cout << A << endl;
            return 0;
        }
    }
    cout << -1 << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:30:14: error: redeclaration of 'bool a1'
   30 |         bool a1 = (A.at(0) == 'S');
      |              ^~
a.cc:25:14: note: 'bool a1' previously declared here
   25 |         bool a1 = (A.at(N - 1) == 'S');
      |              ^~
a.cc:31:14: error: redeclaration of 'bool a2'
   31 |         bool a2 = (S.at(0) == 'o');
      |              ^~
a.cc:26:14: note: 'bool a2' previously declared here
   26 |         bool a2 = (S.at(N - 1) == 'o');
      |              ^~
a.cc:32:14: error: redeclaration of 'bool a3'
   32 |         bool a3 = (A.at(N - 1) == A.at(1));
      |              ^~
a.cc:27:14: note: 'bool a3' previously declared here
   27 |         bool a3 = (A.at(N - 2) == A.at(0));
      |              ^~
Language: C++

#include <bits/stdc++.h>
using namespace std;

char next(char sw,char ox){
	if(sw=='S' && ox=='o')return 'S';
	if(sw=='S' && ox=='x')return 'W';
	if(sw=='W' && ox=='o')return 'W';
	if(sw=='W' && ox=='x')return 'S';
}

string mkstr(string sw, string ox){
int m=sw.size(),n=ox.size();
for(int i=m+1;i<n;i++){
	string x=sw;
	x+=next(sw[i-1],ox[i]);
}
	return x;
}



int main(){
	int n;cin>>n;
	string s;cin>>s;
	vector<string> sws={"SW","WS","SS","WW"};
	for(auto&& u:sws){
	stirng ret=mkstr(u,s);
	if(ret.back()==next(u[1],s[0]))cout<<ret<<endl,exit(0);
	}
	cout<<-1<<endl;
} 







Compiler output:
a.cc: In function 'std::string mkstr(std::string, std::string)':
a.cc:17:16: error: 'x' was not declared in this scope
   17 |         return x;
      |                ^
a.cc: In function 'int main()':
a.cc:27:9: error: 'stirng' was not declared in this scope
   27 |         stirng ret=mkstr(u,s);
      |         ^~~~~~
a.cc:28:12: error: 'ret' was not declared in this scope
   28 |         if(ret.back()==next(u[1],s[0]))cout<<ret<<endl,exit(0);
      |            ^~~
a.cc: In function 'char next(char, char)':
a.cc:9:1: warning: control reaches end of non-void function [-Wreturn-type]
    9 | }
      | ^
Language: C++

#include <bits/stdc++.h>
using namespace std;

char next(char sw,char ox){
	if(sw=='S' && ox='o')return 'S';
	if(sw=='S' && ox='x')return 'W';
	if(sw=='W' && ox='o')return 'W';
	if(sw=='W' && ox='x')return 'S';
}

string mkstr(string sw, string ox){
int m=sw.size(),n=ox.size();
for(int i=m+1;i<n;i++){
	string x=sw;
	x+=next(sw[i-1],ox[i]);
}
	return x;
}

int main(){
	int n;cin>>n;
	string s;cin>>s;
	vector<string> sws={"SW","WS","SS","WW"};
	for(auto&& u:sws){
	stirng ret=mkstr(u,s);
	if(ret.back()==next(u[1],s[0]))cout<<ret<<endl,exit(0);
	}
	cout<<-1<<endl;
} 







Compiler output:
a.cc: In function 'char next(char, char)':
a.cc:5:20: error: lvalue required as left operand of assignment
    5 |         if(sw=='S' && ox='o')return 'S';
      |            ~~~~~~~~^~~~~
a.cc:6:20: error: lvalue required as left operand of assignment
    6 |         if(sw=='S' && ox='x')return 'W';
      |            ~~~~~~~~^~~~~
a.cc:7:20: error: lvalue required as left operand of assignment
    7 |         if(sw=='W' && ox='o')return 'W';
      |            ~~~~~~~~^~~~~
a.cc:8:20: error: lvalue required as left operand of assignment
    8 |         if(sw=='W' && ox='x')return 'S';
      |            ~~~~~~~~^~~~~
a.cc: In function 'std::string mkstr(std::string, std::string)':
a.cc:17:16: error: 'x' was not declared in this scope
   17 |         return x;
      |                ^
a.cc: In function 'int main()':
a.cc:25:9: error: 'stirng' was not declared in this scope
   25 |         stirng ret=mkstr(u,s);
      |         ^~~~~~
a.cc:26:12: error: 'ret' was not declared in this scope
   26 |         if(ret.back()==next(u[1],s[0]))cout<<ret<<endl,exit(0);
      |            ^~~
a.cc: In function 'char next(char, char)':
a.cc:9:1: warning: control reaches end of non-void function [-Wreturn-type]
    9 | }
      | ^
Language: C++

#include <bits/stdc++.h>
using namespace std;

char next(char sw,char ox){
	if(sw=='S' && ox='o')return 'S';
	if(sw=='S' && ox='x')return 'W';
	if(sw=='W' && ox='o')return 'W';
	if(sw=='W' && ox='x')return 'S';
}

Compiler output:
a.cc: In function 'char next(char, char)':
a.cc:5:20: error: lvalue required as left operand of assignment
    5 |         if(sw=='S' && ox='o')return 'S';
      |            ~~~~~~~~^~~~~
a.cc:6:20: error: lvalue required as left operand of assignment
    6 |         if(sw=='S' && ox='x')return 'W';
      |            ~~~~~~~~^~~~~
a.cc:7:20: error: lvalue required as left operand of assignment
    7 |         if(sw=='W' && ox='o')return 'W';
      |            ~~~~~~~~^~~~~
a.cc:8:20: error: lvalue required as left operand of assignment
    8 |         if(sw=='W' && ox='x')return 'S';
      |            ~~~~~~~~^~~~~
a.cc:9:1: warning: control reaches end of non-void function [-Wreturn-type]
    9 | }
      | ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int n;
string s;
char conv(char c){
	return c == 'W' ? 'S' : 'W';
}
char next(char prev, char now){
	if(now == 'S')	return prev;
	else	return conv(prev);
}

string restore(char first,char second){
	string ret = "";
	ret += first;
	ret += second;
	char prev = first;
	char cur = second;
	char tmp;
	for(int i = 1;i<n;i++){
		if(s[i] == 'o')
			tmp=next(prev,cur);
		else
			tmp = conv(next(conv(prev),conv(cur)));
		prev = cur;
		cur = tmp;
		ret += cur;
	}
	return ret;
}

int main() {
	cin>>n>>s;
	char it[2] = {'W','S'};
	bool ok = true;
	for(int i = 0 ; i < 2;i++)
		for(int j = 0;j<2;j++){
			string ans = restore(it[i],it[j]);
			if(ans[n] != ans[0])	ok = false;
			char c;
			if(s[0] == 'o')
				c = restore(s[0],s[n-1]);
			else
				c = conv(restore(conv(s[0]),conv(s[n-1])));
			if ( c != s[1])	ok = false;
			if(!ok)	continue;
			else
				for(int k = 0 ; k<n;k++){	cout<<ans[k];	return 0;}
		}
	cout<<"-1";
	
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:42:44: error: cannot convert 'std::string' {aka 'std::__cxx11::basic_string<char>'} to 'char' in assignment
   42 |                                 c = restore(s[0],s[n-1]);
      |                                     ~~~~~~~^~~~~~~~~~~~~
      |                                            |
      |                                            std::string {aka std::__cxx11::basic_string<char>}
a.cc:44:49: error: cannot convert 'std::string' {aka 'std::__cxx11::basic_string<char>'} to 'char'
   44 |                                 c = conv(restore(conv(s[0]),conv(s[n-1])));
      |                                          ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
      |                                                 |
      |                                                 std::string {aka std::__cxx11::basic_string<char>}
a.cc:5:16: note:   initializing argument 1 of 'char conv(char)'
    5 | char conv(char c){
      |           ~~~~~^
Language: C++

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <cmath>
#include <algorithm>
#include <vector>
#include <numeric>
#include <queue>
#include <map> 
#include <set>
#include <string>
#include <functional>
#include <list>
#include <random>
#include <time.h>
#include <iomanip>
#include <assert.h>
#include <numeric>
#define int long long
#define double long double
#define oku7 1000000007
#define MAXN (int)1e+5 * 2+1
#define LL_MAX 9223372036854775807	//ない環境用
#define LL_HALFMAX 9223372036854775807 / 2	//ない環境用

using namespace std;
std::mt19937 mt((int)time(0));

int dx[4] = { 0, 1, 0, -1 }; // x軸方向への変位
int dy[4] = { 1, 0, -1, 0 }; // y軸方向への変位

char cases[4][100001];
int N;
string s;

int getNextIndex(int now, int mod) {
	return (now + 1) % mod;
}
int getPrevIndex(int now, int mod) {
	return (now + mod - 1) % mod;
}

bool chk(int casenum, int index) {

	int next = getNextIndex(index, N);
	int prev = getPrevIndex(index, N);
	if (s[index] == 'o') {
		if (cases[casenum][index] == 'S' && cases[casenum][next] == cases[casenum][prev]) {
			return true;
		}
		if (cases[casenum][index] == 'W' && cases[casenum][next] != cases[casenum][prev]) {
			return true;
		}
	}
	else {
		if (cases[casenum][index] == 'S' && cases[casenum][next] != cases[casenum][prev]) {
			return true;
		}
		if (cases[casenum][index] == 'W' && cases[casenum][next] == cases[casenum][prev]) {
			return true;
		}
	}
	return false;
}

signed main() {

	cin >> N >> s;
	strcpy(cases[0], "SS");
	strcpy(cases[1], "SW");
	strcpy(cases[2], "WS");
	strcpy(cases[3], "WW");
	bool flag = false;

	for (int i = 0; i < 4; i++) {
		int nowIndex = 1;
		while (cases[i][getNextIndex(nowIndex, N)] == '\0') {
			if (cases[i][nowIndex] == 'S') {
				if (s[nowIndex] == 'o') {
					cases[i][nowIndex + 1] = cases[i][nowIndex - 1];
				}
				else if(cases[i][nowIndex-1] == 'S'){
					cases[i][nowIndex + 1] = 'W';
				}
				else {
					cases[i][nowIndex + 1] = 'S';
				}
			}
			else {
				if (s[nowIndex] == 'x') {
					cases[i][nowIndex + 1] = cases[i][nowIndex - 1];
				}
				else if (cases[i][nowIndex - 1] == 'S') {
					cases[i][nowIndex + 1] = 'W';
				}
				else {
					cases[i][nowIndex + 1] = 'S';
				}
			}
			nowIndex = getNextIndex(nowIndex, N);

		}
		if (chk(i, 0) && chk(i, N - 1)) {
			flag = true;
			cout << cases[i] << "\n";
			break;
		}

		
	}
	if (!flag) cout << "-1\n";





	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:68:9: error: 'strcpy' was not declared in this scope
   68 |         strcpy(cases[0], "SS");
      |         ^~~~~~
a.cc:17:1: note: 'strcpy' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
   16 | #include <assert.h>
  +++ |+#include <cstring>
   17 | #include <numeric>
Language: C++

#include<iostream>
#include<queue>
#include<bitset>
#include<algorithm>
#include<climits>
#include<vector>
#include<deque>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> P;
#define repl(i,a,b) for(ll i=(ll)(a);i<(ll)(b);i++)
#define rep(i,n) repl(i,0,n)
#define fill(x,y) memset(x,y,sizeof(x))
#define all(x) (x).begin(),(x).end()
#define dbg(x) cout<<#x"="<<x<<endl
#define dump(a) rep(i,a.size()){ cout<<a[i]<<" "; } cout<<endl;
#define mmax(x,y) (x>y?x:y)
#define mmin(x,y) (x<y?x:y)
#define INF INT_MAX/3
#define EPS 1e-7


void print(int n, bool t[n]){
  rep(i,n){
    if(t[i]) cout<<'S';
    else cout<<'W';
  }
  cout<<endl;
}

int main(){
  ll n;
  cin>>n;
  string s;
  cin>>s;
  bool t[100001]; // t[i] i番目が本物ならtrue
  /* cout<<((1==1)?"True":"False"); */
  
  rep(i0,2) rep(i1,2) {
    // i0=0, i1=0を仮定する
    t[0]=i0; t[1]=i1;
    /* cout<<"初期値"<<t[0]<<t[1]<<endl; */
    repl(i,1,n-1){
      if(s[i]=='o') 
        t[i+1] = (t[i]) ? t[i-1] : !t[i-1];
      else 
        t[i+1] = (t[i]) ? !t[i-1] : t[i-1];
      /* cout<<i+1<<"は"<<t[i+1]<<endl; */
    }
    if(s[n-1]=='o') {
      bool f = (t[n-1]) ? t[n-2] : !t[n-2];
      if(f==t[0]){
        /* cout<<i0<<i1<<endl; */
        print(n,t);
        return 0;
      }
    } else {
      bool f = (t[n-1]) ? !t[n-2] : t[n-2];
      if(f==t[0]){
        /* cout<<i0<<i1<<endl; */
        print(n,t);
        return 0;
      }
    }
  }
  cout<<"-1"<<endl;
  return 0;
}


Compiler output:
a.cc:24:27: error: use of parameter outside function body before ']' token
   24 | void print(int n, bool t[n]){
      |                           ^
a.cc: In function 'void print(...)':
a.cc:25:9: error: 'n' was not declared in this scope
   25 |   rep(i,n){
      |         ^
a.cc:12:45: note: in definition of macro 'repl'
   12 | #define repl(i,a,b) for(ll i=(ll)(a);i<(ll)(b);i++)
      |                                             ^
a.cc:25:3: note: in expansion of macro 'rep'
   25 |   rep(i,n){
      |   ^~~
a.cc:26:8: error: 't' was not declared in this scope
   26 |     if(t[i]) cout<<'S';
      |        ^
Language: C++

#include <cstdio>

using namespace std;

int main() {
  int n;
  char s[100010], sw[100010];
  scanf("%d", &n);
  scanf("%100005s", s);
  
  for (int i=0;i<4;i++) {
    sw[0] = (i/2 == 0)?'S':'W';
    sw[1] = (i%2 == 0)?'S':'W';

    for (int j=2;j<n;j++) {
      if ((sw[j-1] == 'S') == (s[j-1] == 'o')) {
        sw[j] = sw[j-2];
      } else {
        sw[j] = ((sw[j-2]=='S')?'W':'S');
      }
    }

    bool valid = true;

    if ((sw[n-1] == 'S') == (s[n-1] == 'o'))
      if (sw[n-2] != sw[0]) valid = false
    else
      if (sw[n-2] == sw[0]) valid = false
    
    if ((sw[0] == 'S') == (s[0] == 'o'))
      if (sw[n-1] != sw[1]) valid = false
    else
      if (sw[n-1] == sw[1]) valid = false
    
    if (valid) {
      printf("%s\n", sw);
      return 0;
    }
  }

  printf("-1\n");
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:26:42: error: expected ';' before 'else'
   26 |       if (sw[n-2] != sw[0]) valid = false
      |                                          ^
      |                                          ;
   27 |     else
      |     ~~~~
Language: C++

#pragma GCC optimize(2)

#include<bits/stdc++.h>
#include<cstdio>
#define mp make_pair
#define rep(i,n) for(int i=0;i<n;i++)
#define BINF 0x7fffffff
#define INF 0x3f3f3f3f
#define LINF 9223372036854775807
#define END(s) {cout<<s;return 0;}
#define CON(s) {cout<<s;continue;}
#define BRE(s) {cout<<s;break;}
#define pb push_back
#define All(a) a.begin(),a.end()  //with A in CAPITAL!!!
#define sz(a) (int)a.size()
#define F first
#define S second
using namespace std;
char buf[100005];
bool istrue[100005];
bool issame[100005];
int n;

bool search(){
	for(int i=2;i<n;i++){
		if(istrue[i-1]){
			if(issame[i-1]){
				istrue[i]=istrue[i-2];
			} else {
				istrue[i]=(!istrue[i-2]);
			}
		} else {
			if(issame[i-1]){
				istrue[i]=(!istrue[i-2]);
			} else {
				istrue[i]=istrue[i-2];
			}
		}
	}
	bool ok;
	if(istrue[0]){
		if(issame[0]){
			ok=(istrue[1]==istrue[n-1]);
		} else {
			ok=(istrue[1]!=istrue[n-1]);
		}
	} else {
		if(issame[0]){
			ok=(istrue[1]!=istrue[n-1]);
		} else {
			ok=(istrue[1]==istrue[n-1]);
		}
	}
	if(istrue[n-1]){
		if(issame[n-1]){
			ok&=(istrue[n-2]==istrue[0]);
		} else {
			ok&=(istrue[n-2]!=istrue[0]);
		}
	} else {
		if(issame[n-1]){
			ok&=(istrue[n-2]!=istrue[0]);
		} else {
			ok&=(istrue[n-2]==istrue[0]);
		}
	}
	return ok;
}

int main(){
//	ios::sync_with_stdio(false);
	cin>>n;
	gets(buf); gets(buf);
	rep(i,n){
		issame[i]=(buf[i]=='o');
	}
	rep(i,2){
		rep(j,2){
			istrue[0]=i;
			istrue[1]=j;
			if(search()){
				rep(i,n){
					cout<<(istrue[i]?'S':'W');
				}
				return 0;
			}
		}
	}
	cout<<-1;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:73:9: error: 'gets' was not declared in this scope; did you mean 'getw'?
   73 |         gets(buf); gets(buf);
      |         ^~~~
      |         getw
Language: C++

#pragma GCC optimize(2)

#include<bits/stdc++.h>
#define mp make_pair
#define rep(i,n) for(int i=0;i<n;i++)
#define BINF 0x7fffffff
#define INF 0x3f3f3f3f
#define LINF 9223372036854775807
#define END(s) {cout<<s;return 0;}
#define CON(s) {cout<<s;continue;}
#define BRE(s) {cout<<s;break;}
#define pb push_back
#define All(a) a.begin(),a.end()  //with A in CAPITAL!!!
#define sz(a) (int)a.size()
#define F first
#define S second
using namespace std;
char buf[100005];
bool istrue[100005];
bool issame[100005];
int n;

bool search(){
	for(int i=2;i<n;i++){
		if(istrue[i-1]){
			if(issame[i-1]){
				istrue[i]=istrue[i-2];
			} else {
				istrue[i]=(!istrue[i-2]);
			}
		} else {
			if(issame[i-1]){
				istrue[i]=(!istrue[i-2]);
			} else {
				istrue[i]=istrue[i-2];
			}
		}
	}
	bool ok;
	if(istrue[0]){
		if(issame[0]){
			ok=(istrue[1]==istrue[n-1]);
		} else {
			ok=(istrue[1]!=istrue[n-1]);
		}
	} else {
		if(issame[0]){
			ok=(istrue[1]!=istrue[n-1]);
		} else {
			ok=(istrue[1]==istrue[n-1]);
		}
	}
	if(istrue[n-1]){
		if(issame[n-1]){
			ok&=(istrue[n-2]==istrue[0]);
		} else {
			ok&=(istrue[n-2]!=istrue[0]);
		}
	} else {
		if(issame[n-1]){
			ok&=(istrue[n-2]!=istrue[0]);
		} else {
			ok&=(istrue[n-2]==istrue[0]);
		}
	}
	return ok;
}

int main(){
//	ios::sync_with_stdio(false);
	cin>>n;
	gets(buf); gets(buf);
	rep(i,n){
		issame[i]=(buf[i]=='o');
	}
	rep(i,2){
		rep(j,2){
			istrue[0]=i;
			istrue[1]=j;
			if(search()){
				rep(i,n){
					cout<<(istrue[i]?'S':'W');
				}
				return 0;
			}
		}
	}
	cout<<-1;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:72:9: error: 'gets' was not declared in this scope; did you mean 'getw'?
   72 |         gets(buf); gets(buf);
      |         ^~~~
      |         getw
Language: C++

#include<iostream>
#include<Cstdio>
using namespace std;
int num;
string a,ans;
void deal()
{
    for(int i=2; i<num; i++)
    {
        if(ans[i-1]=='S')
        {
            if(a[i-1]=='o')
                ans+=ans[i-2];
            else
            {
                if(ans[i-2]=='S')
                    ans+='W';
                else
                    ans+='S';
            }
        }
        else
        {
            if(a[i-1]=='x')
                ans+=ans[i-2];
            else
            {
                if(ans[i-2]=='S')
                    ans+='W';
                else
                    ans+='S';
            }
        }
    }
}
bool check()
{
    if(ans[0]=='S')
    {
        if(a[0]=='o'&&ans[num-1]!=ans[1])
            return false;
        else if(a[0]=='x'&&ans[num-1]==ans[1])
            return false;
    }
    if(ans[0]=='W')
    {
        if(a[0]=='x'&&ans[num-1]!=ans[1])
            return false;
        else if(a[0]=='o'&&ans[num-1]==ans[1])
            return false;
    }
    if(ans[num-1]=='S')
    {
        if(a[num-1]=='o'&&ans[num-2]!=ans[0])
            return false;
        else if(a[num-1]=='x'&&ans[num-2]==ans[0])
            return false;
    }
    if(ans[num-1]=='W')
    {
//        cout<<ans[num-2]<<ans[1]<<endl;
        if(a[num-1]=='x'&&ans[num-2]!=ans[0])
            return false;
        else if(a[num-1]=='o'&&ans[num-2]==ans[0])
            return false;
    }
    return true;
}
int main()
{
    cin>>num;
    cin>>a;
    ans="SS";
    deal();
    if(check())
        cout<<ans<<endl;
    else
    {
        ans="SW";
        deal();
        if(check())
            cout<<ans<<endl;
        else
        {
            ans="WS";
            deal();
            if(check())
                cout<<ans<<endl;
            else
            {
                ans="WW";
                deal();
                if(check())
                    cout<<ans<<endl;
                else
                    cout<<"-1"<<endl;
            }
        }
    }
    return 0;
}


Compiler output:
a.cc:2:9: fatal error: Cstdio: No such file or directory
    2 | #include<Cstdio>
      |         ^~~~~~~~
compilation terminated.
Language: C++

#include<stdio.h>
#include<iostream>
#include<string>
using namespace std;
string lie;
int zhong[1000005];
bool zhao(int a){
    for(int i=2;i<a;i++){
        if(lie[i-1]=='o'){
            if(zhong[i-1]==0)zhong[i]=zhong[i-2];
            else zhong[i]=(zhong[i-2]+1)%2;
        }
        else{
            if(zhong[i-1]==1)zhong[i]=zhong[i-2];
            else zhong[i]=(zhong[i-2]+1)%2;
        }
    }
    int s,s2;
    if(lie[a-1]=='o'){
        if(zhong[a-1]==0)s=zhong[a-2];
        else s=(zhong[a-2]+1)%2;
    }
    else{
        if(zhong[a-1]==1)s=zhong[a-2];
        else s=(zhong[a-2]+1)%2;
    }
    if(lie[1]=='o'){
        if(zhong[1]==0)s1=zhong[2];
        else s1=(zhong[2]+1)%2;
    }
    else{
        if(zhong[1]==1)s1=zhong[2];
        else s1=(zhong[2]+1)%2;
    }
    if(s==zhong[0]&&s1==zhong[a-1]){
        for(int i=0;i<a;i++){
            if(zhong[i]==0)printf("S");
            else printf("W");
        }puts("");return 1;
    }
    else return 0;
}
int main(){
    int n;
    cin>>n>>lie;
    zhong[0]=0;zhong[1]=0;
    if(zhao(n)==1)return 0;
    zhong[0]=1;zhong[1]=0;
    if(zhao(n)==1)return 0;
    zhong[0]=0;zhong[1]=1;
    if(zhao(n)==1)return 0;
    zhong[0]=1;zhong[1]=1;
    if(zhao(n)==1)return 0;
    printf("-1\n");return 0;
}


Compiler output:
a.cc: In function 'bool zhao(int)':
a.cc:28:24: error: 's1' was not declared in this scope; did you mean 's2'?
   28 |         if(zhong[1]==0)s1=zhong[2];
      |                        ^~
      |                        s2
a.cc:29:14: error: 's1' was not declared in this scope; did you mean 's2'?
   29 |         else s1=(zhong[2]+1)%2;
      |              ^~
      |              s2
a.cc:32:24: error: 's1' was not declared in this scope; did you mean 's2'?
   32 |         if(zhong[1]==1)s1=zhong[2];
      |                        ^~
      |                        s2
a.cc:33:14: error: 's1' was not declared in this scope; did you mean 's2'?
   33 |         else s1=(zhong[2]+1)%2;
      |              ^~
      |              s2
a.cc:35:21: error: 's1' was not declared in this scope; did you mean 's2'?
   35 |     if(s==zhong[0]&&s1==zhong[a-1]){
      |                     ^~
      |                     s2
a.cc:42:1: warning: control reaches end of non-void function [-Wreturn-type]
   42 | }
      | ^
Language: C

#include <cstdio>
int n;
char s[100001],r[100001];
bool c(char a,char b)
{
    r[0]=a;
    r[1]=b;
    for (int i=2; i<n; ++i)
r[i]=r[i-1]=='S'?s[i-1]=='o'?r[i-2]:r[i-2]=='S'?'W':'S':s[i-1]=='x'?r[i-2]:r[i-2]=='S'?'W':'S';
    return !(r[n-1]=='S'&&((s[n-1]=='o'&&r[n-2]!=r[0])||(s[n-1]=='x'&&r[n-2]==r[0])))&&
           !(r[0]=='S'&&((s[0]=='o'&&r[1]!=r[n-1])||(s[0]=='x'&&r[1]==r[n-1])))&&
           !(r[n-1]=='W'&&((s[n-1]=='x'&&r[n-2]!=r[0])||(s[n-1]=='o'&&r[n-2]==r[0])))&&
           !(r[0]=='W'&&((s[0]=='x'&&r[1]!=r[n-1])||(s[0]=='o'&&r[1]==r[n-1])));
}
int main()
{
    scanf("%d%s",&n,s);
    puts(c('S','W')||c('W','S')||c('W','W')||c('S','S')?r:"-1");
    return 0;
}

Compiler output:
main.c:1:10: fatal error: cstdio: No such file or directory
    1 | #include <cstdio>
      |          ^~~~~~~~
compilation terminated.
Language: C++

#include<string>
#include<deque>
#include<queue>
#include<vector>
#include<algorithm>
#include<iostream>
#include<set>
#include<cmath>
#include<tuple>
#include<chrono>
#include<functional>
#include<iterator>
#include<random>
#include<unordered_set>
#include<map>
using namespace std;
typedef long long int llint;
#define mp make_pair
#define mt make_tuple
#define pub push_back
#define puf push_front
#define pob pop_back
#define pof pop_front
#define fir first
#define sec second
#define res resize
#define ins insert
#define era erase
const int mod=1000000007;
const llint big=1e18+10;
const long double pai=3.141592653589793238462643383279502884197;
const long double eps=1e-9;
template <class T,class U>void mineq(T& a,U b){if(a>b){a=b;}}
template <class T,class U>void maxeq(T& a,U b){if(a<b){a=b;}}
int gcd(int a,int b){if(a%b==0){return b;}else return gcd(b,a%b);}//a>b
class in_t{public:
	int a;in_t(){cin>>a;}
	operator int() {return a;}
};
class lin_t{public:
	llint a;lin_t(){cin>>a;}
	operator llint() {return a;}
};
class ld_t{public:
	long double a;ld_t(){cin>>a;}
	operator long double() {return a;}
};
int main(void){
	in_t n;
	string str;cin>>str;
	//o->SSS,WSW
	string ans;
	ans.res(n+2);
	for(int ba=0;ba<4;ba++){
		if(ba==0){ans[0]='S',ans[1]='S';}
		if(ba==1){ans[0]='S',ans[1]='W';}
		if(ba==2){ans[0]='W',ans[1]='S';}
		if(ba==3){ans[0]='W',ans[1]='W';}
		for(i=1;i<=n;i++){
			int bi=0;
			if(ans[i-1]=='W'){bi++;}
			if(ans[i]=='W'){bi++;}
			if(str[i-1]=='x'){bi++;}
			if(bi%2==0){ans[i+1]='S';}
			else{ans[i+1]='W';}
		}
		if(!(ans[0]==ans[n]&&ans[1]==ans[n+1])){continue;}
		ans.pob();ans.pob();
		cout<<ans<<endl;return 0;
	}
	cout<<"-1"<<endl;
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:59:21: error: 'i' was not declared in this scope
   59 |                 for(i=1;i<=n;i++){
      |                     ^
Language: C++

#include <iostream>
#include <stdio.h>
#include <stdlib.h>

using namespace std;

char *search(char a, char b, char *s, int N) {
  char *ans = (char *)malloc(N + 2);
  ans[0] = a;
  ans[1] = b;
  for (int i = 0; i < N - 1; i++) {
    if (s[i + 1] == 'o' && ans[i + 1] == 'S') {
      ans[i + 2] = ans[i];
    } else if (s[i + 1] == 'x' && ans[i + 1] == 'W') {
      ans[i + 2] = ans[i];
    } else {
      if (ans[i] == 'S') {
        ans[i + 2] = 'W';
      } else {
        ans[i + 2] = 'S';
      }
    }
  }
  if (s[0] == 'o' && ans[0] == 'S') {
    ans[N + 1] = ans[1];
  } else if (s[0] == 'x' && ans[0] == 'W') {
    ans[N + 1] = ans[1];
  } else {
    if (ans[1] == 'S') {
      ans[N + 1] = 'W';
    } else {
      ans[N+1] = 'S';
    }
  }
  if (ans[N-1] == ans[N + 1] && ans[0] == a[N]) {
    ans[N] = '\0';
    ans[N + 1] = '\0';
    return ans;
  } else {
    return NULL;
  }
  free(ans);
}

int main() {
  int N;
  char *s = (char *)malloc(N + 1);
  cin >> N >> s;

  char *epoch0 = search('S', 'S', s, N);
  // char *epoch1 = search('S', 'W', s, N);
  // char *epoch2 = search('W', 'S', s, N);
  // char *epoch3 = search('W', 'W', s, N);

  if (epoch0 != NULL) {
    cout << epoch0 << endl;
  } else {
    free(epoch0);
    char *epoch1 = search('S', 'W', s, N);
    if (epoch1 != NULL) {
      cout << epoch1 << endl;
    } else {
      free(epoch1);
      char *epoch2 = search('W', 'S', s, N);
      if (epoch2 != NULL) {
        cout << epoch2 << endl;
      } else {
        free(epoch2);
        char *epoch3 = search('W', 'W', s, N);
        if (epoch3 != NULL) {
          cout << epoch2 << endl;
        } else {
          free(epoch3);
          cout << -1 << endl;
        }
      }
    }
  }

  return 0;
}


Compiler output:
a.cc: In function 'char* search(char, char, char*, int)':
a.cc:35:44: error: invalid types 'char[int]' for array subscript
   35 |   if (ans[N-1] == ans[N + 1] && ans[0] == a[N]) {
      |                                            ^
a.cc:42:7: warning: control reaches end of non-void function [-Wreturn-type]
   42 |   free(ans);
      |   ~~~~^~~~~
Language: C++

#include <iostream>
#include <stdio.h>
#include <stdlib.h>

using namespace std;

char *search(char a, char b, char *s, int N) {
  char *ans = (char *)malloc(N + 2);
  ans[0] = a;
  ans[1] = b;
  for (int i = 0; i < N - 1; i++) {
    if (s[i + 1] == 'o' && ans[i + 1] == 'S') {
      ans[i + 2] = ans[i];
    } else if (s[i + 1] == 'x' && ans[i + 1] == 'W') {
      ans[i + 2] = ans[i];
    } else {
      if (ans[i] == 'S') {
        ans[i + 2] = 'W';
      } else {
        ans[i + 2] = 'S';
      }
    }
  }
  if (s[0] == 'o' && ans[0] == 'S') {
    ans[N + 1] = ans[1];
  } else if (s[0] == 'x' && ans[0] == 'W') {
    ans[N + 1] = ans[1];
  } else {
    if (ans[1] == 'S') {
      ans[N + 1] = 'W';
    } else {
      ans[N; !] = 'S';
    }
  }
  if (ans[N - 1] == ans[N + 1] && ans[0] == a[N]) {
    ans[N] = '\0';
    ans[N + 1] = '\0';
    return ans;
  } else {
    return NULL;
  }
  free(ans);
}

int main() {
  int N;
  char *s = (char *)malloc(N + 1);
  cin >> N >> s;

  char *epoch0 = search('S', 'S', s, N);
  // char *epoch1 = search('S', 'W', s, N);
  // char *epoch2 = search('W', 'S', s, N);
  // char *epoch3 = search('W', 'W', s, N);

  if (epoch0 != NULL) {
    cout << epoch0 << endl;
  } else {
    free(epoch0);
    char *epoch1 = search('S', 'W', s, N);
    if (epoch1 != NULL) {
      cout << epoch1 << endl;
    } else {
      free(epoch1);
      char *epoch2 = search('W', 'S', s, N);
      if (epoch2 != NULL) {
        cout << epoch2 << endl;
      } else {
        free(epoch2);
        char *epoch3 = search('W', 'W', s, N);
        if (epoch3 != NULL) {
          cout << epoch2 << endl;
        } else {
          free(epoch3);
          cout << -1 << endl;
        }
      }
    }
  }

  return 0;
}


Compiler output:
a.cc: In function 'char* search(char, char, char*, int)':
a.cc:32:12: error: expected ']' before ';' token
   32 |       ans[N; !] = 'S';
      |            ^
      |            ]
a.cc:32:15: error: expected primary-expression before ']' token
   32 |       ans[N; !] = 'S';
      |               ^
a.cc:35:46: error: invalid types 'char[int]' for array subscript
   35 |   if (ans[N - 1] == ans[N + 1] && ans[0] == a[N]) {
      |                                              ^
a.cc:42:7: warning: control reaches end of non-void function [-Wreturn-type]
   42 |   free(ans);
      |   ~~~~^~~~~
Language: C++

#include <bits/stdc++.h>

using namespace std;

//#define FILE_IO

int N;
char s[100005];
int v[100005];

int main()
{
    #ifdef FILE_IO
    freopen("1.in", "r", stdin);
    freopen("1.out", "w", stdout);
    #endif

    scanf("%d\n", &N);
    gets(s + 1);
    for(int i = 1; i <= N; i++)
    {
        if(s[i] == 'o')
            s[i] = 0;
        else
            s[i] = 1;
    }

    for(v[1] = 0; v[1] <= 1; v[1]++)
        for(v[2] = 0; v[2] <= 1; v[2]++)
        {
            for(int i = 2; i < N; i++)
                v[i + 1] = v[i] ^ v[i - 1] ^ s[i];
            if(v[1] == v[N] ^ v[N - 1] ^ s[N] && v[N] == v[1] ^ v[2] ^ s[1])
            {
                for(int i = 1; i <= N; i++)
                {
                    if(v[i] == 0)
                        printf("S");
                    else
                        printf("W");
                }
                return 0;
            }
        }
    printf("-1\n");

    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:19:5: error: 'gets' was not declared in this scope; did you mean 'getw'?
   19 |     gets(s + 1);
      |     ^~~~
      |     getw
Language: C++

#include <bits/stdc++.h>
using namespace std;

#define FOR(i,a,b) for(int i=(a);i<(int)(b);i++)
#define rep(i,b) FOR(i,0,b)

typedef long long ll;
const int SIZE=5+1e6;
const int INF=10+1e9;
ll n;
bool issure(bool x[SIZE]){
  rep(i,n){
    if(x[i]==A[i]) if(x[(i+1)%n]!=x[(i-1+n)%n])return false;
    if(x[i]!=A[i]) if(x[(i+1)%n]==x[(i-1+n)%n])return false;
  }
  return false;
}
int main(){
  cin>>n;
  string s;

  cin>>s;
  for(int i=0;i<n;i++){
    A[i]=s[i]='o';
  }
  bool answer = false;
  for(int i=0;i<4;i++){
    ans[0]= dx[i];
    ans[1]= dy[i];
    FOR(j,2,n){
      if(ans[j-1]==A[j-1])ans[j]=ans[j-2];
      else ans[j]=!ans[j-2];
    }
    if(issure(ans)){
      rep(j,n)
      cout<<(ans[j]?'S':'W');
      cout<<endl;
      return 0;
    }
  }
  cout<<-1<<endl;
  return 0;
}


Compiler output:
a.cc: In function 'bool issure(bool*)':
a.cc:13:14: error: 'A' was not declared in this scope
   13 |     if(x[i]==A[i]) if(x[(i+1)%n]!=x[(i-1+n)%n])return false;
      |              ^
a.cc:14:14: error: 'A' was not declared in this scope
   14 |     if(x[i]!=A[i]) if(x[(i+1)%n]==x[(i-1+n)%n])return false;
      |              ^
a.cc: In function 'int main()':
a.cc:24:5: error: 'A' was not declared in this scope
   24 |     A[i]=s[i]='o';
      |     ^
a.cc:28:5: error: 'ans' was not declared in this scope; did you mean 'abs'?
   28 |     ans[0]= dx[i];
      |     ^~~
      |     abs
a.cc:28:13: error: 'dx' was not declared in this scope
   28 |     ans[0]= dx[i];
      |             ^~
a.cc:29:13: error: 'dy' was not declared in this scope
   29 |     ans[1]= dy[i];
      |             ^~
a.cc:31:20: error: 'A' was not declared in this scope
   31 |       if(ans[j-1]==A[j-1])ans[j]=ans[j-2];
      |                    ^
Language: C++

#include <algorithm>
#include <cmath>
#include <climits>
#include <cstring>
#include <cstdio>
#include <deque>
#include <fstream>
#include <iomanip>
#include <iostream>
#include <map> //pair is also included in this library
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <unordered_map>
#include <vector>

#define REP(i, s, n) for(int i = (int)(s); i < (int)(n); i++)
#define fst first
#define snd second
#define MP make_pair //incase c++11 or later is not available

using namespace std;

typedef long long int ll;
typedef vector<int> VI;
typedef vector<ll> VL;
typedef pair<int, int> PII;
typedef pair<ll, ll> PLL;

//prefer define statement
//for reason that const int ver. of INF will raise a silly warning (unused variable)
#define INF (INT_MAX/3)
#define LIM_INF (INT_MAX)
//const int INF = INT_MAX/3;
#define PI = 3.14159265358979323846
/*------------------------------------------------------------------------------*/

int main(){
  int N;
  cin >> N;

  string s;
  cin >> s;

  VI ans(N);
  //0 -> S, 1 -> W
  vector<bool> sample = {0, 0, 0, 1, 1, 0, 1, 1};
  int cnt = 0;
  bool b = false;

  while(cnt < 4){
    ans[0] = sample[cnt*2];
    ans[1] = sample[cnt*2+1];
    REP(i, 2, N){
      if(s[i-1] == 'o' && !ans[i-1]){
        ans[i] = ans[i-2];
      }
      if(s[i-1] == 'x' && !ans[i-1]){
        ans[i] = !ans[i-2];
      }
      if(s[i-1] == 'o' && ans[i-1]){
        ans[i] = !ans[i-2];
      }
      if(s[i-1] == 'x' && ans[i-1]){
        ans[i] = ans[i-2];
      }
    }
    bool order1 = false//, order2 = false;
    if(s[0] == 'o' && !ans[0]){
      order1 = ans[1] == ans[N-1];
    }
    if(s[0] == 'x' && !ans[0]){
      order1 = ans[1] == !ans[N-1];
    }
    if(s[0] == 'o' && ans[0]){
      order1 = ans[1] == !ans[N-1];
    }
    if(s[0] == 'x' && ans[0]){
      order1 = ans[1] == ans[N-1];
    }
    // if(s[N-1] == 'o' && !ans[N-1]){
    //   order2 = ans[0] == ans[N-2];
    // }
    // if(s[N-1] == 'x' && !ans[N-1]){
    //   order2 = ans[0] == !ans[N-2];
    // }
    // if(s[N-1] == 'o' && ans[N-1]){
    //   order2 = ans[0] == !ans[N-2];
    // }
    // if(s[N-1] == 'x' && ans[N-1]){
    //   order2 = ans[0] == ans[N-2];
    // }
    if(order1){
      b = true;
      break;
    }
    cnt++;
  }
  if(b){
    REP(i, 0, N){
      if(ans[i]){
        cout << 'W';
      } else {
        cout << 'S';
      }
    }
    cout << endl;
  } else {
    cout << -1 << endl;
  }

  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:70:5: error: expected ',' or ';' before 'if'
   70 |     if(s[0] == 'o' && !ans[0]){
      |     ^~
Language: C++

#include <iostream>
#include <algorithm>

using namespace std;

typedef long long ll;

int main()
{
  string line;
  getline(cin, line);
  const int N = stoi(line);
  getline(cin, line);

  vector<char> cands = {'S', 'W'};
  for(char first : cands)
  {
	for(char second : cands)
	{
	  vector<char> ans(N);
	  ans[0] = first;
	  ans[1] = second;
	  ans[N - 1] = ((ans[0] == 'S') ^ (line[0] == 'o') ^ (ans[1] == 'S') == true) ? 'S' : 'W';
	  
	  for(int i = 2; i < N - 1; i++)
	  {
		ans[i] = ((ans[i - 1] == 'S') ^ (line[i - 1] == 'o') ^ (ans[i - 2] == 'S') == true) ? 'S' : 'W';
	  }
	  if(((ans[N - 1] == 'S') ^ (line[N - 1] == 'o') ^ (ans[N - 2] == 'S') ^ (ans[0] == 'S')) == false)
	  {
		for(auto ch : ans) cout << ch;
		cout << endl;
		return 0;
	  }
	}
  }
  cout << -1 << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:15:3: error: 'vector' was not declared in this scope
   15 |   vector<char> cands = {'S', 'W'};
      |   ^~~~~~
a.cc:3:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
    2 | #include <algorithm>
  +++ |+#include <vector>
    3 | 
a.cc:15:10: error: expected primary-expression before 'char'
   15 |   vector<char> cands = {'S', 'W'};
      |          ^~~~
a.cc:16:20: error: 'cands' was not declared in this scope
   16 |   for(char first : cands)
      |                    ^~~~~
a.cc:20:18: error: expected primary-expression before 'char'
   20 |           vector<char> ans(N);
      |                  ^~~~
a.cc:21:11: error: 'ans' was not declared in this scope; did you mean 'abs'?
   21 |           ans[0] = first;
      |           ^~~
      |           abs