func_code_string: #include <bits/stdc++.h>   using namespace std;   using pii = pair<long long, long long>;   using pil = pair<long long, long long>;   using pli = pair<long long, long long>;   using pll = pair<long long, long long>;   using pdd = pair<long double, long double>;   using vint = vector<long long>;   using vll = vector<long long>;   using vpii = vector<pii>;   using vpil = vector<pil>;   using vpli = vector<pli>;   using vpll = vector<pll>;   const long long N = 3e5 + 5;   const long long Inf = 1e9 + 7;   const long long INF = 1e18 + 7;   const long long Mod = 998244353;   const long double eps = 1e-9;   void io() {     ios_base::sync_with_stdio(0);     cin.tie(NULL);   }   long long n;   long long a[N], b[N], c[N];   long long ms(long long l, long long r) {     long long ans = 0;     if (r - l < 2) return 0;     long long m = (l + r) >> 1;     ans += ms(l, m);     ans += ms(m, r);     long long lp = l, rp = m;     long long ptr = 0;     while (lp < m && rp < r) {       if (c[lp] <= c[rp]) {         b[ptr] = c[lp];         ans += rp - m;         ++lp;         ++ptr;       } else {         b[ptr] = c[rp];         ++ptr;         ++rp;       }     }     for (; lp < m; ++lp) {       b[ptr++] = c[lp];       ans += r - m;     }     for (; rp < r; ++rp) b[ptr++] = c[rp];     for (long long i = l; i < r; ++i) {       c[i] = b[i - l];     }     return ans;   }   long long get_ic(long long x) {     for (long long i = 0; i < n; ++i) {       c[i] ^= x;     }     return ms(0, n);   }   long long get_icr(long long x) {     for (long long i = 0; i < n; ++i) {       c[i] ^= x;     }     return ms(0, n);   }   void cp() {     for (long long i = 0; i < n; ++i) c[i] = a[i];   }   void solve() {     cin >> n;     for (long long i = 0; i < n; ++i) cin >> a[i];     long long ans = 0;     cp();     for (long long i = 29; i > -1; --i) {       long long ic = get_ic(ans);       cp();       long long icr = get_icr(ans + (1 << i));       cp();       if (icr < ic) ans += (1 << i);     }     long long t = get_ic(ans);     cout << t <<     << ans <<   n ;   }   signed main() {     io();     long long tt = 1;     while (tt--) {       solve();     }   }   