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归类了 OJ，整理了一下

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Fengyi Chen
2024-02-15 22:38:30 +08:00
parent 76c1ecea65
commit 8dbc0861b2
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27
XSM OJ 重庆小码王集团OJ/小码君的烦恼.cpp Normal file
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#include <iostream>
#include <iomanip>
#include <cstring>
using namespace std;
int main(){
char a[10000];
int b=0;
cin >>a;
if(a[0]>='0' && a[0]<='9'){
cout <<"no";
return 0;
}
for(int i=1;i<strlen(a);i++){
if((a[i]>='a' && a[i]<='z') || (a[i]>='A' && a[i]<='Z') || (a[i]>='0' && a[i]<='9') || a[i]=='_'){
b++;
}
}
if(b==strlen(a)-1){
cout <<"yes";
}
else{
cout <<"no";
}
return 0;
}