func_code_string: #include <bits/stdc++.h>   using namespace std;   int dirx[8] = {0, 0, 1, -1, 1, 1, -1, -1};   int diry[8] = {1, -1, 0, 0, 1, -1, 1, -1};   string tostring(long long n) {     if (!n) return  0 ;     string ans =   ;     while (n != 0) {       ans += (n % 10) +  0 ;       n /= 10;     }     reverse(ans.begin(), ans.end());     return ans;   }   double toDouble(string s) {     double ans = 0;     int i = 0, flag = 0, cnt = 0, ff = 1;     while (i < s.length()) {       if (s[i] ==  - ) {         ff = -1;         i++;         continue;       }       if (s[i] ==  . ) {         flag = 1;         i++;         continue;       }       ans *= 10;       ans += s[i] -  0 ;       if (flag) cnt++;       i++;     }     ans *= ff;     return ans / pow(10, cnt);   }   int ar[1005];   int main() {     int n, a, b;     scanf( %d , &n);     for (int i = 1; i < n; i++) {       scanf( %d %d , &a, &b);       ar[a]++;       ar[b]++;     }     int ans = 0;     for (int i = 1; i <= n; i++) {       ans += (ar[i] == 1);     }     cout << ans << endl;     return 0;   }   