Submission #2169075

---

Source Code Expand

#include <bits/stdc++.h>
//#include <math.h>
using namespace std;

#define INF 1.1e9
#define LINF 1.1e18
#define FOR(i,a,b) for (int i=(a);i<(b);++i)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) (v).begin(),(v).end()
#define pb push_back
#define pf push_front
#define fi first
#define se second
#define BIT(x,n) bitset<n>(x)
#define PI 3.14159265358979323846

typedef long long ll;
typedef pair<ll,int> P;
//typedef pair<int,P> PP;

//-----------------------------------------------------------------------------

int r,c,x,y,d,l;
const int MOD=1e9+7;
ll ans,zero,one,two,three,four;
ll comb[910][910];

void calc() {
	REP(i,910) comb[i][0]=comb[i][i]=1;
	FOR(i,1,910) FOR(j,1,i) comb[i][j]=(comb[i-1][j-1]+comb[i-1][j])%MOD;
}

ll f(ll N,ll R) {
	if(N<=0||R<=0||R>N) return 0;
	return comb[N][R];
}

int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);

	calc();

	cin>>r>>c>>x>>y>>d>>l;

	ans=(r-x+1)*(c-y+1)%MOD;
	(ans*=comb[d+l][d])%=MOD;
	(zero+=f((x-2)*(y-2),d+l))%=MOD;
	(one=2*f((x-2)*(y-1),d+l)%MOD+2*f((x-1)*(y-2),d+l)%MOD)%=MOD;
	(two=4*f((x-1)*(y-1),d+l)%MOD+f((x-2)*y,d+l)+f(x*(y-2),d+l))%=MOD;
	(three=2*f((x-1)*y,d+l)%MOD+2*f(x*(y-1),d+l)%MDO)%=MOD;
	(four=f(x*y,d+l))%=MOD;
	ll tmp=(four-three+two-one+zero);
	while(tmp<0) tmp+=MOD;
	cout<<ans*tmp%MOD<<endl;

	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:51:47: error: ‘MDO’ was not declared in this scope
  (three=2*f((x-1)*y,d+l)%MOD+2*f(x*(y-1),d+l)%MDO)%=MOD;
                                               ^