#include <stdio.h> int main() { int m = 0; scanf("%d",&m); int arr[m]; arr[0] = m * (m - 1) + 1; for(int i = 1;i < m;i++) { arr[i] = arr[i - 1] + 2; } for(int i = 0;i < m;i++) { printf("%d",arr[i]); if(arr[i] != arr[m - 1]) { printf("+"); } } return 0; }