Submission #1732555

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Source Code Expand

#include<set>
#include<map>
#include<deque>
#include<queue>
#include<stack>
#include<cmath>
#include<ctime>
#include<bitset>
#include<string>
#include<vector>
#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<climits>
#include<complex>
#include<iostream>
#include<algorithm>
#define ll long long
using namespace std;

const int maxn = 110;
const int Mod = 1e9+7;

int n,m;
int a[maxn];
int f[maxn][maxn][maxn];

void add(int &x,int y){ x+=y; if(x>=Mod)x-=Mod; }

int main()
{
	scanf("%d",&n); m=2*n-1;
	for(int i=1;i<=m;i++) scanf("%d",&a[i]);
	sort(a+1,a+m+1);
	
	f[1][1][1]=1;
	for(int k=1;k<n;k++)
	{
		for(int i=1;i<=m;i++) for(int j=1;j<=i;j++) if(f[k][i][j])
		{
			int tmp=f[k][i][j];
			int now=j,al=i;
			if(a[n-k]!=a[n-k+1]) al++,now++;
			if(a[n+k]!=a[n+k-1]) al++;
			
			add(f[k+1][al][now],tmp);
			for(int l=1;l<now;l++) add(f[k+1][al-(now-l-1)][l],tmp);
			for(int l=now+1;l<=al;l++) add(f[k+1][al-(l-now-1)][now+1],tmp);
		}
	}
	int re=0;
	for(int i=1;i<=m;i++) for(int j=1;j<=i;j++) add(re,f[n][i][j]);
	printf("%d\n",re);
	
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:32:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n); m=2*n-1;
                ^
./Main.cpp:33:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1;i<=m;i++) scanf("%d",&a[i]);
                                         ^

Judge Result