洛谷P1106 删数问题

<pre name="code" class="cpp">#include<iostream>#include<cstdio>#include<string>#include<cstring>using namespace std;char a[251];int main(){int n,len,j,i,k;gets(a);cin>>n;len=strlen(a);for(i=1;i<=n;i++){for(j=0;j<len-1;j++)if(a[j]>a[j+1]){    for(k=j;k<len-1;k++)a[k]=a[k+1];break;}len--;}int b=0;while(a[b]=='0'&&b<len-1)b++;for(i=b;i<len;i++)cout<<a[i];return 0;}