#include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     int a[n], b[n];     for (int i = 0; i < n; i++) cin >> a[i];     b[n - 1] = a[n - 1];     for (int j = 0; j < n - 1; j++) b[j] = a[j] + a[j + 1];     for (int k = 0; k < n; k++) cout << b[k] <<    ;     return 0;   }   