From 0dc1123350e55a6f557b08cfffafdff334132434 Mon Sep 17 00:00:00 2001
From: Yasasvi Peruvemba <44848793+YasasviPeruvemba@users.noreply.github.com>
Date: Thu, 22 Oct 2020 16:14:09 +0530
Subject: [PATCH] Create 431C.cpp

---
 431C.cpp | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 431C.cpp

diff --git a/431C.cpp b/431C.cpp
new file mode 100644
index 0000000..c069641
--- /dev/null
+++ b/431C.cpp
@@ -0,0 +1,42 @@
+#include <bits/stdc++.h>
+#define ll long long int
+#define MOD 1000000007
+using namespace std;
+ 
+ll dp[100][2];
+ 
+int min(int a, int b){
+	if(a<b) return a;
+	else return b;
+}
+ 
+ll solve(ll n, ll k, ll d){
+	for(int i=1;i<=n;i++){
+		for(int j=1;j<=min(i,k);j++){
+			if(j<d){
+				dp[i][0] += dp[i-j][0];
+				dp[i][0]%=MOD;
+ 
+				dp[i][1] += dp[i-j][1];
+				dp[i][1]%=MOD;
+			}
+			else{
+				dp[i][1] += dp[i-j][0];
+				dp[i][1]%=MOD;
+				dp[i][1] += dp[i-j][1];
+				dp[i][1]%=MOD;
+			}
+		}
+	}
+	return dp[n][1];
+}
+ 
+int main(){
+	// Initialise values
+	dp[0][0] = 1; //No restrictions
+	dp[0][1] = 0; //Initially impossible
+ 
+	ll n,k,d;
+	cin>>n>>k>>d;
+	cout<<solve(n,k,d)<<"\n";
+}