func_code_string: #include <bits/stdc++.h>   using namespace std;   const double PI = acos(-1.0);   const int INF = 1000000000;   const int MOD = 1000000007;   const int base = 1000 * 1000 * 1000;   int main() {     int n, m;     cin >> n >> m;     int l = 1, r = n;     string str, str1, str2, str3;     int t;     for (int i = 0; i < m; i++) {       cin >> str >> str1 >> str2 >> str3 >> t;       if (str2 ==  left ) {         if (t <= r) {           r = t - 1;         }       } else {         if (t >= l) {           l = t + 1;         }       }       if (l > r) {         cout << -1;         return 0;       }     }     cout << r - l + 1;     return 0;   }   