func_code_string: #include <bits/stdc++.h>   using namespace std;   void fr(int &a, bool f = 0, char ch = getchar()) {     for (a = 0; ch <  0  || ch >  9 ; ch = getchar()) ch ==  -  ? f = 1 : 0;     for (; ch >=  0  && ch <=  9 ; ch = getchar()) a = a * 10 + ch -  0 ;     a = f ? -a : a;   }   int fr() {     int a;     return fr(a), a;   }   const int N = 12;   int arr[(1 << N) + 10], a[(1 << N) + 10], ans[(1 << N) + 10], p[(1 << N) + 10];   int tmp[(1 << N) + 10];   bool visval[(1 << N) + 10], vispos[(1 << N) + 10];   struct OI {     int RP, score;   } CSPS2021, NOIP2021;   int main() {     CSPS2021.RP++, CSPS2021.score++, NOIP2021.RP++, NOIP2021.score++, 392699;     srand(time(0));     int n = fr(), xsum = 0, tot = 1 << n;     for (int i = 0; i < (1 << n); i++) fr(a[i]), xsum ^= a[i], arr[i] = i;     if (xsum) return puts( Fou ), 0;     puts( Shi );     for (int i = 0; i < (1 << n); i++) {       int pos = rand() % tot, arrpos = arr[pos];       if (pos != tot - 1) arr[pos] = arr[tot - 1];       tot--, tmp[0] = 0;       bool flag = 0;       for (int j = 0; j < (1 << n); j++)         if (vispos[j] == 0 && visval[arrpos ^ a[j]] == 0) {           flag = visval[arrpos ^ a[j]] = vispos[j] = 1, ans[j] = arrpos,           p[arrpos ^ a[j]] = j;           break;         } else if (vispos[j] == 0)           tmp[++tmp[0]] = j;       if (flag == 0) {         int j = tmp[rand() % tmp[0] + 1];         vispos[p[arrpos ^ a[j]]] = 0;         arr[tot++] = ans[p[arrpos ^ a[j]]], ans[j] = arrpos;         vispos[j] = 1;         visval[ans[j] ^ a[j]] = 1;         p[ans[j] ^ a[j]] = j;         i--;       }     }     for (int i = 0; i < (1 << n); i++) printf( %d  , ans[i] ^ a[i]);     puts(  );     for (int i = 0; i < (1 << n); i++) printf( %d  , ans[i]);     puts(  );     return 0;   }   