#include <bits/stdc++.h> using namespace std; int main(){ int a[] = {3,7,5,13,25,45,78,23,8,33,9,19,28,41,50}; int n; cin >> n; if(n%2==1){ int i; for(i=0;i<15;i++){ if(a[i]==n){ cout << i+1 << endl; break; } } if(i==15){ cout << "Error" << endl; } } else{ cout << "Error" << endl; } return 0; }
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