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- string tos(int n){
- if(n==0)
- return "0";
- string ans;
- char c;
- while(n!=0){
- ans+='0'+n%10;
- n/=10;
- }
- for(int i=0;i<ans.size()/2;i++){
- c=ans[i];
- ans[i]=ans[ans.size()-1-i];
- ans[ans.size()-1-i]=c;
- }
- return ans;
- }
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