Submission #1796642

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Source Code Expand

#include <iostream>
#include <stdio.h>
#include <math.h>
#include <string.h>
#include <time.h>
#include <stdlib.h>
#include <string>
#include <bitset>
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <algorithm>
#include <sstream>
#include <stack>
#include <iomanip>
using namespace std;
#define pb push_back
#define mp make_pair
typedef pair<int,int> pii;
typedef long long ll;
typedef double ld;
typedef vector<int> vi;
#define fi first
#define se second
#define fe first
#define FO(x) {freopen(#x".in","r",stdin);freopen(#x".out","w",stdout);}
#define Edg int M=0,fst[SZ],vb[SZ],nxt[SZ];void ad_de(int a,int b){++M;nxt[M]=fst[a];fst[a]=M;vb[M]=b;}void adde(int a,int b){ad_de(a,b);ad_de(b,a);}
#define Edgc int M=0,fst[SZ],vb[SZ],nxt[SZ],vc[SZ];void ad_de(int a,int b,int c){++M;nxt[M]=fst[a];fst[a]=M;vb[M]=b;vc[M]=c;}void adde(int a,int b,int c){ad_de(a,b,c);ad_de(b,a,c);}
#define es(x,e) (int e=fst[x];e;e=nxt[e])
#define esb(x,e,b) (int e=fst[x],b=vb[e];e;e=nxt[e],b=vb[e])
int n,a[555],f[123][123][123];
const int MOD=1e9+7;
int main()
{
	scanf("%d",&n);
	for(int i=1;i<=n+n-1;++i)
		scanf("%d",a+i);
	sort(a+1,a+n+n);
	f[n][1][1]=1;
	for(int r=n;r>1;--r)
	{
		int dt=(a[r-1]!=a[r])+(a[n+n-r+1]!=a[n+n-r]);
		for(int i=1;i<=n+n;++i)
		{
			for(int j=1;j<=i;++j) if(f[r][i][j])
			{
				int ii=i+dt,jj=j+(a[r-1]!=a[r]),F=f[r][i][j];
				for(int p=1;p<=ii;++p)
				{
					if(abs(p-jj)<=1)
						(f[r-1][ii][p]+=F)%=MOD;
					else if(p<jj)
						(f[r-1][ii-(jj-p)+1][p]+=F)%=MOD;
					else
						(f[r-1][ii-(p-jj)+1][jj+1]+=F)%=MOD;
				}
			}
		}
	}
	ll ans=0;
	for(int i=1;i<=n+n;++i)
		for(int j=1;j<=i;++j)
			ans+=f[1][i][j];
	printf("%lld\n",ans%MOD);
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:36:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^
./Main.cpp:38:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",a+i);
                  ^

Judge Result