Language: C++

#include<bits/stdc++.h>
#define all(x) (x).begin(),(x).end()
typedef long long ll;
#define rep(i,n) for(ll i=0, i##_len=(n); i<i##_len; ++i)
using namespace std;
#define sz(x) ((int)(x).size())
#define ZERO(a) memset(a,0,sizeof(a))
#define MINUS(a) memset(a,0xff,sizeof(a))
#define MEMSET(v, h) memset((v), h, sizeof(v))
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }
#define pb push_back
#define mp make_pair
#define y0 y3487465
#define y1 y8687969
#define j0 j1347829
#define j1 j234892
ll gcd(ll a,ll b){return b?gcd(b,a%b):a;}
const ll INF = 1LL<<60;
 
int main() {
	string X;
  	cin >> X;
  	sflag = false;
  	nflag = false;
  	eflag = false;
  	wflag = false;
  	rep(i,X.size()){
      if(X[i]　= 'S') sflag = true;
      if(X[i]　= 'N') nflag = true;
      if(X[i]　= 'E') eflag = true;
      if(X[i]　= 'W') wflag = true;
    }
  if(sflag){
    if(nflag && !eflag && !wflag){
      cout << "Yes" << endl;
      return 0;
    }
    else if (nflag && eflag && !wflag || nflag && !eflag && wflag){
      cout << "No" << endl;
      return 0;
    }
    else{
      cout << "Yes" << endl;
      return 0;
    }
  }
  if(nflag){
    if(sflag && !eflag && !wflag){
      cout << "Yes" << endl;
      return 0;
    }
    else if (sflag && eflag && !wflag || nflag && !eflag && wflag){
      cout << "No" << endl;
      return 0;
    }
    else{
      cout << "Yes" << endl;
      return 0;
    }
  }
  if(eflag){
    if(wflag && !sflag && !nflag){
      cout << "Yes" << endl;
      return 0;
    }
    else if (wflag && sflag && !nflag || wflag && !sflag && nflag){
      cout << "No" << endl;
      return 0;
    }
    else{
      cout << "Yes" << endl;
      return 0;
    }
  }
  if(wflag){
    if(eflag && !sflag && !nflag){
      cout << "Yes" << endl;
      return 0;
    }
    else if (eflag && sflag && !nflag || eflag && !sflag && nflag){
      cout << "No" << endl;
      return 0;
    }
    else{
      cout << "Yes" << endl;
      return 0;
    }
  }
  
}

Compiler output:
a.cc:29:14: error: extended character 　 is not valid in an identifier
   29 |       if(X[i]　= 'S') sflag = true;
      |              ^
a.cc:30:14: error: extended character 　 is not valid in an identifier
   30 |       if(X[i]　= 'N') nflag = true;
      |              ^
a.cc:31:14: error: extended character 　 is not valid in an identifier
   31 |       if(X[i]　= 'E') eflag = true;
      |              ^
a.cc:32:14: error: extended character 　 is not valid in an identifier
   32 |       if(X[i]　= 'W') wflag = true;
      |              ^
a.cc: In function 'int main()':
a.cc:24:9: error: 'sflag' was not declared in this scope
   24 |         sflag = false;
      |         ^~~~~
a.cc:25:9: error: 'nflag' was not declared in this scope
   25 |         nflag = false;
      |         ^~~~~
a.cc:26:9: error: 'eflag' was not declared in this scope
   26 |         eflag = false;
      |         ^~~~~
a.cc:27:9: error: 'wflag' was not declared in this scope
   27 |         wflag = false;
      |         ^~~~~
a.cc:29:14: error: expected ')' before '\U00003000'
   29 |       if(X[i]　= 'S') sflag = true;
      |         ~    ^~
      |              )
a.cc:30:14: error: expected ')' before '\U00003000'
   30 |       if(X[i]　= 'N') nflag = true;
      |         ~    ^~
      |              )
a.cc:31:14: error: expected ')' before '\U00003000'
   31 |       if(X[i]　= 'E') eflag = true;
      |         ~    ^~
      |              )
a.cc:32:14: error: expected ')' before '\U00003000'
   32 |       if(X[i]　= 'W') wflag = true;
      |         ~    ^~
      |              )