80分求助

keda2761 @ 2023-01-13 14:29:07

#include<bits/stdc++.h>
using namespace std;
char ch[5005];
int n[5005];
int main(){
    cin>>ch;
    for(int i=0;ch[i]!='\0';i++){
        n[ch[i]-97]++;
    }
    for(int i=0;i<26;i++){
        if(n[i]==1){
            cout<<char(i+97);
            return 0;
        }
    }
    cout<<"no";
    return 0;
}

by GSRgsrgsr @ 2023-01-13 14:32:03

@zhouyilin 第一个指在序列中的位置，所以应该将序列再扫一遍

by GSRgsrgsr @ 2023-01-13 14:34:48

hack:

inout:cba

output:c

your ouput:a

by keda2761 @ 2023-01-13 14:35:24

那代码呢？@GSRgsrgsr

by GSRgsrgsr @ 2023-01-13 14:37:29

等下我写

by GSRgsrgsr @ 2023-01-13 14:40:11

#include<bits/stdc++.h>
#define int long long 
using namespace std;
map<char,int> mp;
signed main(){
    string s;
    cin>>s;
    int l=s.length();
    for(int i=0;i<l;++i)mp[s[i]]++;
    for(int i=0;i<l;++i){
        if(mp[s[i]]==1){
            printf("%c",s[i]);
            return 0;
        }
    }
    printf("no");
    return 0; 
}

by keda2761 @ 2023-01-13 14:42:33

谢啦！@GSRgsrgsr

by keda2761 @ 2023-01-15 13:33:31

AC代码吗？@GSRgsrgsr

by GSRgsrgsr @ 2023-01-15 14:06:10

@zhouyilin 是的，我交了一发A了

by GSRgsrgsr @ 2023-01-15 14:06:41

@zhouyilin AC记录

by keda2761 @ 2023-01-16 09:20:55

@GSRgsrgsr AC了。