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Maximum subsequence sum such that no three are consecutive
In this tutorial, we will be discussing a program to find maximum subsequence sum such that no three are consecutive.
For this we will be provided with a series of positive integers. Our task is to find the maximum sum without taking in their consecutive positive integers in the sum value.
Example
#include <bits/stdc++.h>
using namespace std;
//returning maximum subsequence without involving
//three consecutive numbers
int maxSumWO3Consec(int arr[], int n) {
int sum[n]; if (n >= 1) sum[0] = arr[0];
if (n >= 2) sum[1] = arr[0] + arr[1];
if (n > 2) sum[2] = max(sum[1], max(arr[1] + arr[2], arr[0] + arr[2]));
for (int i = 3; i < n; i++)
sum[i] = max(max(sum[i - 1], sum[i - 2] + arr[i]), arr[i] + arr[i - 1] + sum[i - 3]);
return sum[n - 1];
}
int main() {
int arr[] = { 100, 1000 };
int n = sizeof(arr) / sizeof(arr[0]);
cout << maxSumWO3Consec(arr, n);
return 0;
}Output
1100
Updated on: 10-Jul-2020
212 Views
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