DSA-practice/isitfibonacci.cpp at master · shugo6414/DSA-practice · GitHub

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//{ Driver Code Starts
// Initial Template for C++

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


// } Driver Code Ends
// User function Template for C++

class Solution {
  public:
    long long solve(int n, int k, vector<long long> GeekNum) {
        // code here
        if(n==k){
            return GeekNum[n-1];
        }
        long long sum=0;
        for(int i=0;i<k;i++){
            sum+=GeekNum[i];
        }
        vector<long long>v=GeekNum;
        v.push_back(sum);
        for(int i=k+1;i<n;i++){
            sum=sum+v[i-1]-v[i-k-1];
            v.push_back(sum);
        }
        return v[n-1];
    }
};


//{ Driver Code Starts.

int main() {
    int T;
    cin >> T;
    while (T--) {
        int N, K;
        cin >> N >> K;

        vector<long long> GeekNum(K);

        for (int i = 0; i < K; i++) cin >> GeekNum[i];

        Solution ob;
        cout << ob.solve(N, K, GeekNum) << "\n";
    }
    return 0;
}

// } Driver Code Ends