"use strict";
const Main = (input) =>{
   let xs = input.trim().split('\n');
   let xs1= xs[1].trim().split('').sort();
   //console.log(xs1);
   let count = 0;
   for(let i =0; i<xs[0]; i++){
     for(let j =i+1; j<xs[0]; j++){
         if(xs1[i]==xs1[j]){
         count +=1;
         }else{
         count +=0;
         }
     } 
   }
   //console.log(count);
   if(count >= xs[0]/2&&xs[0]%2==0){
     console.log('Yes');
   }else{
     console.log('No');
   }
}
Main(require('fs').readFileSync('/dev/stdin','utf8'));