Submission #2414551

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Source Code Expand

#include<stdio.h>
#include<stdlib.h>
int R=1,C=1,H[2000010],N[2000010];
//評価関数（いまはMin）
int hyouka(int a,int b){
  if(C<b)return 1;
  if(C<a||b==0)return 0;
  return N[H[a]]<N[H[b]]?1:0;
}
//挿入関数
void hin(int a){
  int i=C++;
  for(N[H[0]=R]=a;hyouka(0,i/2);i/=2)H[i]=H[i/2];
  H[i]=R++;
}
//取り出す関数
int hout(){
  int rt=H[1],i,j=2,k=H[--C];
  for(i=1;hyouka(i,C);i=j)H[i]=H[j=i*2+1-hyouka(i*2,i*2+1)];
  H[j/2]=k;
  return rt;
}
int main(){
  int n,i,a,b=0,M=1e9+7;
  long long s=1,c=1,d[100010]={1,1};
  for(i=1;i<=100000;i++)d[i]=(d[i-1]*i)%M;
  scanf("%d",&n);
  for(i=0;i<n*2;i++){
    scanf("%d",&a);
    hin(a);
  }
  for(i=0;i<n*2;i++){
    a=hout();
    //printf("%d %d %d\n",a,N[a],b);
    if(a<=n){
      if(b<0)s=(s*abs(b))%M;
      b++;
    }
    else{
      if(b>0)s=(s*abs(b))%M;
      b--;
    }
    //(a=hout())<=n?(b++):(b--);//printf("%d\n",b);
    // if(b&&a>n)s=(s*abs(b))%M;
  }
  printf("%lld\n",s);
  return 0;
}

Submission Info

Compile Error

./Main.c: In function ‘main’:
./Main.c:27:3: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&n);
   ^
./Main.c:29:5: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&a);
     ^

Judge Result