func_code_string: #include <bits/stdc++.h>   #pragma comment(linker,  /STACK:36777216 )   using namespace std;   const int inf = 1 << 30;   const long long Inf = 1LL << 62;   const int dx[] = {-1, 0, 1, 0, -1, -1, 1, 1, 0};   const int dy[] = {0, 1, 0, -1, -1, 1, 1, -1, 0};   const double eps = 1e-9;   const double pi = 3.1415926535897932384626433832795;   template <class T>   inline bool eq(const T &a, const T &b) {     return fabs(a - b) < eps;   }   template <class T>   inline bool deg2(const T &n) {     return (n & (n - 1)) == 0;   }   template <class T>   inline void chmax(T &a, const T &b) {     a = max(a, b);   }   inline int intRand(int l, int r) {     return ((rand() << 16) | rand()) % (r - l + 1) + l;   }   inline long long llRand(long long l, long long r) {     return (((1ll * rand()) << 48) | ((1ll * rand()) << 32) | (rand() << 16) |             rand()) %                (r - l + 1) +            l;   }   int i, n, len, j;   string s, pr;   int main() {     ios_base::sync_with_stdio(false);     srand(time(NULL));     cin >> n;     cin >> pr;     len = (int)pr.size();     for (i = 1; i < n; i++) {       cin >> s;       for (j = 0; j < len; j++)         if (s[j] != pr[j]) break;       len = j;       pr = s;     }     cout << len;     return 0;   }   