func_code_string: #include <bits/stdc++.h>   using namespace std;   void solve() {     int a, b, c;     cin >> a >> b >> c;     if (a + c <= b)       puts( 0 );     else {       int a2 = max(((a + b + c) >> 1) + 1, a);       a += c;       cout << a - a2 + 1 << endl;     }     return;   }   int main() {     int T;     cin >> T;     while (T--) {       solve();     }   }   