Submission #127625

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
127625	2019-07-09T17:29:29 Z	TadijaSebez	Kangaroo (CEOI16_kangaroo)	C++11	Compilation error	0 ms	0 KB

kangaroo

#include <bits/stdc++.h>
using namespace std;
const int mod=1e9+7;
const int N=2005;
int dp[N][N][2],sum[N][N][2];
int Get(int i, int l, int r, int t)
{
	int x=sum[i][r][t]-sum[i][l-1][t];
	if(x<0) x+=mod;
	return x;
}
int main()
{
	int n,cs,cf;
	scanf("%i %i %i",&n,&cs,&cf);
	dp[1][1][0]=dp[1][1][1]=1;
	for(int l=2;l<=n;l++)
	{
		for(int i=1;i<=l-1;i++)
			for(int j=1;j<=l-1;j++)
			{
				sum[i][j][0]=sum[i][j-1][0]+dp[i][j][0];
				if(sum[i][j][0]>=mod) sum[i][j][0]-=mod;
				sum[i][j][1]=sum[i][j-1][1]+dp[i][j][1];
				if(sum[i][j][1]>=mod) sum[i][j][1]-=mod;
			}
		for(int i=1;i<=l;i++)
			for(int j=1;j<=l;j++)
			{
				if(i!=j)
				{
					dp[i][j][0]=Get(i-(i>j),1,j-1,1);
					dp[i][j][1]=Get(i-(i>j),j,l-1,0);
				}
				else dp[i][j][0]=dp[i][j][1]=0;
			}
	}
	int ans=add(dp[cs][cf][0],dp[cs][cf][1]);
	printf("%i\n",ans);
	return 0;
}

Compilation message

kangaroo.cpp: In function 'int main()':
kangaroo.cpp:38:10: error: 'add' was not declared in this scope
  int ans=add(dp[cs][cf][0],dp[cs][cf][1]);
          ^~~
kangaroo.cpp:15:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%i %i %i",&n,&cs,&cf);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~