求大佬DeBug (样例过了 但是全WA)

#include<string>
#include<vector>
#include<stdio.h>
inline std::string Read(){
    std::string s="";
    char ch=getchar();
    while(ch!='\n')s.push_back(ch),ch=getchar();
    return s;
}
int main(){
    int n;
    scanf("%d",&n);
    getchar();
    std::vector<std::string> Song(n),Change(n),Ans(n);
    for(int i=0;i<n;i++){
        Song[i]=Read();
        Change[i]=Read();
	}
	int Up=n-1,Same=0,Down=0;
	for(int i=0;i<n;i++)if(Change[i]=="DOWN")Ans[Down++]=Song[i];
	for(int i=0;i<n;i++){
		if(Change[i]=="SAME"){
			Ans[Down+Same]=Song[i];
			Same++;
		}
	}
	for(int i=n-1;i>=0;i--)if(Change[i]=="UP")Ans[Up--]=Song[i];
	for(auto i:Ans)printf("%s\n",i.c_str());
    return 0;
}