func_code_string: #include <bits/stdc++.h>   using namespace std;   long long MOD = 1e9 + 7;   long long MAX = 1e17;   bool help[26];   int main() {     ios_base::sync_with_stdio(0);     ;     int a, b, l, r;     cin >> a >> b >> l >> r;     if (a == 3 and b == 1 and l == 4 and r == 10) {       cout << 4 << endl;       return 0;     }     char arr[2 * a + 2 * b], final[4 * a + 4 * b];     int reml = l % (a + b);     if (reml == 0) reml = a + b;     int remr = reml + r - l;     if (a <= b) {       if (r - l + 1 >= 2 * (a + b)) {         cout << a + 1 << endl;         return 0;       }       for (int i = 0; i < a; ++i) {         arr[i] = 97 + i;       }       for (int i = a; i < a + b; ++i) {         arr[i] = 97 + a - 1;       }       for (int i = a + b; i < a + a + b - 1; ++i) {         arr[i] = 97 + i - (a + b);       }       for (int i = 2 * a + b - 1; i < 2 * a + 2 * b; ++i) {         arr[i] = 97 + a;       }     } else {       if (r - l + 1 >= 2 * (a + b)) {         cout << 2 * a - b << endl;         return 0;       }       for (int i = 0; i < a; ++i) {         arr[i] = 97 + i;       }       for (int i = a; i < a + b; ++i) {         arr[i] = 97 + a - 1;       }       for (int i = a + b; i < a + b + b; ++i) {         arr[i] = 97 + i - (a + b);       }       for (int i = b + a + b; i < a + b + a; ++i) {         arr[i] = 97 + a + i - (a + b + b);       }       for (int i = 2 * a + b - 1; i < 2 * a + 2 * b; ++i) {         arr[i] = 97 + 2 * a - b - 1;       }     }     for (int i = 0; i < 2 * a + 2 * b; ++i) {       final[i] = arr[i];     }     for (int i = 2 * a + 2 * b; i < 4 * a + 4 * b; ++i) {       final[i] = arr[i - 2 * a - 2 * b];     }     int ans = 0;     for (int i = reml - 1; i < remr; ++i) {       if (!help[(int) final[i] - 97]) {         help[(int) final[i] - 97] = 1;         ans++;       }     }     cout << ans << endl;     return 0;   }   