Auraus

input/code.cpp: In function 'int main()':
input/code.cpp:24:22: error: 'a' was not declared in this scope
         long c = abs(a-b)+1;
                      ^
input/code.cpp:24:24: error: 'b' was not declared in this scope
         long c = abs(a-b)+1;
                        ^

#include <bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
 
int main(){
 
    long n, m, k;
    cin >> n >> m >> k;
 
    long cnt = 0;
 
    vector<long> cs(m);
 
    for(int i = 0; i < m; i++){
        long a, b;
        cin >> a >> b;
        cs[i] = abs(a-b)+1;
    }
    sort(cs.begin(), cs.end());
 
    for(int i = 0; i < m; i++){
        long c = abs(a-b)+1;
        cout << "C:" << c << endl;
        if(k >= c){
            k-=c;
            cnt++;
        }
    }
 
    cout << cnt << endl;
 
}