func_code_string: #include <bits/stdc++.h>   using namespace std;   char s[90];   void error() {     cout << -1 << endl;     exit(0);   }   int main() {     int n, m, l = 1, r;     scanf( %d%d n , &n, &m);     r = n;     while (m--) {       int v;       scanf( To the %s of %d n , s, &v);       if (!strcmp(s,  left )) {         if (l >= v) error();         if (r >= v) r = v - 1;       } else {         if (r <= v) error();         if (l <= v) l = v + 1;       }     }     cout << r - l + 1 << endl;     return 0;   }   