第一题:
#include <iostream>
#include <vector>
#include <map>
#include <cstring>
#include <string>
#include <algorithm>
using namespace std;
int main() {
ios::sync_with_stdio(false);
//freopen("input.txt", "r", stdin);
int a, b, c;
cin >> a >> b >> c;
cout << b - c + 1 << endl;
return 0;
}