Language: C++

#include <bits/stdc++.h>
using namespace std;
#define int                  long long int
#define ff                   first
#define ss                   second
#define pb                   push_back
#define mp                   make_pair
#define pii                  pair<int,int>
#define vi                   vector<int>
#define mi                   map<int,int>
#define pqb                  priority_queue<int>
#define pqs                  priority_queue<int,vi,greater<int>>
#define setbits(x)           __builtin_popcountll(x)
#define zrobits(x)           __builtin_ctzll(x)
#define mod                  1000000007
#define inf                  1e18
#define precise(x,y)         fixed<<setprecision(y)<<x
#define w(x)                 int x;cin>>x;while(x--)
#define endl                 "\n"
#define no_of_digit(n)       floor(log10(n))+1
#define copyarr(a,b,n)       copy_n(a,n,b)
mt19937                      rng(chrono::steady_clock::now().time_since_epoch().count());

//*******************to check if all number in array are positive*******************
//all_of(arr,arr+n,[](int x){return x>0;})?cout<<"positive":cout<<"some negative";


//*******************to check if any element in array is negative*******************
//any_of(arr,arr+n,[](int x){return x<0;})?cout<<"Any negative":cout<<"All positive";


int32_t main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    //*****************Enter the code here*******************//
    int l=INT_MIN,r=INT_MAX;
    int n,m;
    cin>>n>>m;
    while(m--)
    {
    	int a,b;
    	cin>>a>>b;
    	l=max(l,a);
    	r=min(r,b);
    }
    cout<<max(0,r-l+1)<<endl;
    return 0;
}


Compiler output:
a.cc: In function 'int32_t main()':
a.cc:47:14: error: no matching function for call to 'max(int, long long int)'
   47 |     cout<<max(0,r-l+1)<<endl;
      |           ~~~^~~~~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:47:14: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   47 |     cout<<max(0,r-l+1)<<endl;
      |           ~~~^~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:47:14: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   47 |     cout<<max(0,r-l+1)<<endl;
      |           ~~~^~~~~~~~~