Codeforces Round #388 (Div. 2), problem: (C) Voting Solution in C/C++

Codeforces Round #388 (Div. 2), problem: (C) Voting Solution in C/C++

 

#include<stdio.h>
typedef unsigned u;
char S[222222],D[222222];
int main()
{
	u l,i,ds,rs,dq,rq;
	ds=rs=dq=rq=0;
	scanf("%u%s",&l,S);
	for(i=-1;++i<l😉
	{
		if(S[i]=='D')++ds;
		if(S[i]=='R')++rs;
	}
	for(;ds&&rs😉
	{
		for(i=-1;++i<l😉if(!D[i])
		{
			if(S[i]=='D')
			{
				if(dq){--dq;--ds;D[i]=1;continue;}
				++rq;
			}
			if(S[i]=='R')
			{
				if(rq){--rq;--rs;D[i]=1;continue;}
				++dq;
			}
		}
	}
	if(ds)putchar('D');
	if(rs)putchar('R');
	return 0;
}
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