can someone help me to find out the bug??
Edit: for n=1e9, it is giving negative value.
Edit: link to my correct code: #include <bits/stdc++.h>using namespace std;long long f[1000001]={0};lon - Pastebin.com
Can’t find anything wrong.
Maybe try removing this and copy paste your code.
#ifndef ONLINE_JUDGE
freopen("ip.txt", "r", stdin);
freopen("op.txt", "w", stdout);
#endif