func_code_string: #include <bits/stdc++.h>   using namespace std;   long long fastpow(int a, int b, int MOD) {     long long x = 1, y = a;     while (b > 0) {       if (b % 2 == 1) {         x = (x * y) % MOD;       }       y = (y * y) % MOD;       b /= 2;     }     return x;   }   long long InverseEuler(int n, int MOD) { return fastpow(n, MOD - 2, MOD); }   long long f[3];   bool init;   long long C(int n, int r, int MOD) {     if (!init) {       init = 1;       f[0] = 1;       for (int i = 1; i < 300000; i++) f[i] = (f[i - 1] * i) % MOD;     }     return (f[n] *             ((InverseEuler(f[r], MOD) * InverseEuler(f[n - r], MOD)) % MOD)) %            MOD;   }   int N;   string s[77000];   unordered_map<int, int> ct[9];   unordered_map<int, int> loc[9][77000];   int main() {     std::ios::sync_with_stdio(false);     cin >> N;     for (int i = 0; i < N; i++) {       cin >> s[i];       int M = s[i].length();       for (int j = 0; j < M; j++) {         int tmp = 0;         for (int k = j; k < M; k++) {           tmp = tmp * 10 + (s[i][k] -  0 );           ct[k - j][tmp]++;           loc[k - j][i][tmp]++;         }       }     }     for (int i = 0; i < N; i++) {       int M = s[i].length();       int ln = 10;       int res;       for (int j = 0; j < M; j++) {         int tmp = 0;         for (int k = j; k < M; k++) {           if (k - j >= ln) break;           tmp = tmp * 10 + (s[i][k] -  0 );           if (ct[k - j][tmp] == loc[k - j][i][tmp]) {             res = tmp;             ln = k - j;           }         }       }       string res2 =   ;       while (res) {         res2 +=  0  + (res % 10);         res /= 10;       }       reverse(res2.begin(), res2.end());       while (res2.size() != ln + 1) res2 =  0  + res2;       cout << res2 << endl;     }   }   