Submission #320088

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
320088	2020-11-07T13:54:21 Z	keta_tsimakuridze	Tents (JOI18_tents)	C++14	Compilation error	0 ms	0 KB

tents

#include<bits/stdc++.h>
using namespace std;
const int mod=1e9+7;
long long n,m,k,i,dp[3005][3-05];
int main(){
	cin>>n>>m;
	dp[0][0]=1;
	for(k=1;k<=max(n,m);k++)
	dp[k][0]=dp[0][k]=1;
	for(k=1;k<=n;k++){	
	for(i=1;i<=m;i++){
		dp[k][i]=dp[k-1][i];
		if(i>=2) dp[k][i]+=dp[k-1][i-2]%mod*(i*(i-1))/2%mod;
		dp[k][i]+=4*i*dp[k-1][i-1]%mod;
		if(k>=2) dp[k][i]+=dp[k-2][i-1]%mod*i%mod*(k-1)%mod;
		dp[k][i]%=mod;
	//	cout<<k<<" "<<i<<" "<<dp[k][i]<<endl;
	
	} }
	cout<<(dp[n][m]-1+mod)%mod;
}

Compilation message

tents.cpp:4:32: error: narrowing conversion of '-2' from 'int' to 'long unsigned int' [-Wnarrowing]
    4 | long long n,m,k,i,dp[3005][3-05];
      |                                ^
tents.cpp:4:29: error: size '-2' of array 'dp' is negative
    4 | long long n,m,k,i,dp[3005][3-05];
      |                            ~^~~