980A - Links and Pearls - CodeForces Solution

#include<bits/stdc++.h>
#define int long long 
#define rep(i,x,y) for(int i=x;i<=y;i++)
#define pre(i,x,y) for(int i=x;i>=y;i--)
using namespace std;
const int INF=0x3f3f3f3f,mod=1e9+7;

void solve(){
	string s;
	cin>>s;
	int x=0,y=0;
	rep(i,0,s.size()-1){
		if(s[i]=='-')x++;
		else y++;
	}
	if(x==0||y==0)cout<<"YES";
	else if(x%y==0)cout<<"YES";
	else cout<<"NO";
}

signed main(){ 
	ios::sync_with_stdio(false);
	cin.tie(0);cout.tie(0);
	solve();
    return 0;
}
/*
2 0
1 3

*/