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Discussion of Problem 1007. Code Words

P1007(Code words).Please help
Posted by Mih 31 Dec 2001 01:12
what's wrong with this code:

#include<iostream.h>
#include<string.h>

#define MAXN 1006


void solve();
void outp(int a[MAXN]);

int N;

int main(){
   cin>>N;
   while(cin&&!cin.eof()) solve();
   return 0;
}
void solve(){
   int a[MAXN];
   char s[MAXN];
   int kvo1=0,sum=0,pos=1;
   cin>>s;
   int len=strlen(s);
   for(int i=0;i<len;i++){
      if(s[i]=='1') sum+=pos,kvo1++;
      a[pos-1]=s[i]-'0';
      pos++;
   }
   if(pos==(N+1)){
      if(sum%(N+1)==0){
         outp(a);
     return;
      }
      for(int i=0;i<pos;i++)
         if(a[i])
        if((sum-i-1)%(N+1)==0){
           a[i]=0;
           outp(a);
           return;
            }
   }
   if(pos==N){
      int pass=0;
      for(int i=0;i<=pos;i++){
         if((sum+kvo1-pass)%(N+1)==0){
        for(int j=pos-1;j>i;j--) a[j]=a[j-1];
           a[i]=0;
        outp(a);
        return;
         }
     if((sum+kvo1-pass+i+1)%(N+1)==0){
        for(int j=pos-1;j>i;j--) a[j]=a[j-1];
        a[i]=1;
        outp(a);
        return;
     }
     if(a[i]) pass++;
      }
   }
   if(pos==N+2){
      int pass=0;
      for(int i=0;i<=pos;i++){
         if(a[i]){
        pass++;
        if((sum-kvo1+pass-i-1)%(N+1)==0){
           for(int j=i;j<=pos;j++) a[j]=a[j+1];
           outp(a);
           return;
            }
         }
         if(!a[i]){
            if((sum-kvo1+pass)%(N+1)==0){
           for(int j=i;j<=pos;j++) a[j]=a[j+1];
           outp(a);
           return;
            }
         }
      }
   }
}
void outp(int a[MAXN]){
   for(int i=0;i<N;i++) cout<<a[i];
   cout<<"\n";
}