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cc_SEARRAYS.cpp
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cc_SEARRAYS.cpp
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/* Ankit Srivastava */
#include <bits/stdc++.h>
using namespace std;
#define MOD 1000000007
#define pb(x) push_back(x)
#define mp(x,y) make_pair(x,y)
#define FF first
#define SS second
#define s(n) scanf("%d",&n)
#define sl(n) scanf("%lld",&n)
#define sf(n) scanf("%lf",&n)
#define ss(n) scanf("%s",n)
#define sc(n) {char temp[4]; ss(temp); n=temp[0];}
#define INF (int)1e9
#define LINF (long long)1e18
#define EPS 1e-9
#define maX(a,b) ((a)>(b)?(a):(b))
#define miN(a,b) ((a)<(b)?(a):(b))
#define abS(x) ((x)<0?-(x):(x))
typedef long long ll;
typedef unsigned long long LL;
typedef pair<int,int> PII;
typedef pair<LL,LL> PLL;
typedef pair<int,PII> TRI;
typedef vector<int> VI;
typedef vector<LL> VL;
typedef vector<ll> vl;
typedef vector<PII> VII;
typedef vector<TRI> VT;
int n, k;
ll dp[100005];
int TEST_NO;
void precompute() {
}
void read() {
s(n), s(k);
}
void preprocess() {
memset(dp, 0, sizeof dp);
}
void solve() {
dp[0] = 1;
for (int i = 1; i < k; ++i) {
dp[i] = 1;
}
for (int i = k; i <= n; ++i) {
dp[i] = dp[i - 1] + dp[i - k];
if(dp[i] >= MOD) dp[i] -= MOD;
}
printf("%lld\n", dp[n]);
}
int main() {
precompute();
int t;
s(t);
for(TEST_NO = 1; TEST_NO <= t; TEST_NO ++) {
read();
preprocess();
solve();
}
return 0;
}