#include<stdio.h>
#include<stdbool.h>

int q[1048576];
int qp=0,qqp=0;

void qpush(int x){
    qp++;q[qp]=x;
}

int qpop(){
    qqp++;
    return q[qqp];
}

int dsc[512][512]={0};
int sid[512][512];
int res[524288],rc=0;

bool isvalid(int a,int b){
  if(a<0||a>500){return false;}
  if(b<0||b>500){return false;}
  return true;
}

void rem(int a,int b){
  if(sid[a][b]==-1){return;}
  sid[a][b]=-1;
  int i,j,x,y;
  for(i=-10;i<=10;i++){
    for(j=-10;j<=10;j++){
      if((i*i+j*j)>=100){continue;}
      x=a+i;y=b+j;
      if(isvalid(x,y)){
        if(sid[x][y]!=-1){
          dsc[x][y]--;
          if(dsc[x][y]<=89){
            dsc[x][y]=1000000007;
            qpush(x*512+y);
          }
        }
      }
    }
  }
}

void sit(int a,int b){
  if(sid[a][b]==-1){return;}
  res[rc]=sid[a][b];
  rc++;
  int i,j,x,y;
  for(i=-10;i<=10;i++){
    for(j=-10;j<=10;j++){
      if((i*i+j*j)>=100){continue;}
      x=a+i;y=b+j;
      if(isvalid(x,y)){rem(x,y);}
    }
  }
}

int main(){
  int i,j,k,n,a,b,x,y;
  for(i=0;i<512;i++){
    for(j=0;j<512;j++){sid[i][j]=-1;}
  }
  scanf("%d",&n);
  for(i=1;i<=n;i++){
    scanf("%d%d",&a,&b);
    sid[a][b]=i;
    for(j=-10;j<=10;j++){
      for(k=-10;k<=10;k++){
        if((j*j+k*k)>=100){continue;}
        x=a+j;y=b+k;
        if(isvalid(x,y)){dsc[x][y]++;}
      }
    }
    dsc[a][b]--;
  }
  for(i=0;i<512;i++){
    for(j=0;j<512;j++){
      if(sid[i][j]!=-1 && dsc[i][j]<=89){
        dsc[i][j]=1000000007;
        qpush(i*512+j);
      }
    }
  }
  while(qp!=qqp){
    x=qpop();
    sit(x/512,x%512);
  }
  printf("%d\n",rc);
  for(i=0;i<rc;i++){
    if(i){printf(" ");}
    printf("%d",res[i]);
  }printf("\n");
}