Language: C++

#include<iostream>
#include<algorithm> 
using namespace std;
struct node
{
	long long u,v,data;
	bool operator < (const node &a)const
	{
		return data<a.data;
	}
};
node edge[200001];
long long n,m,a[100001],b[100001],head[100001],rt[100001],sz[100001],Mx[100001];
int find(int x)
{
	if (rt[x]==x)
		return x;
	return rt[x]=find(rt[x]);
}
void unionn(int x,int y)
{
	sz[find(y)]+=sz[find(x)];
	Mx[find(y)]=min(Mx[find(y)],max(Mx[find(x)],a[find(y)]-b[find(y)]-sz[find(x)]));
	rt[find(x)]=find(y);
	return;
}
int main()
{
	cin>>n>>m;
	for (int i=1;i<=n;++i)
	{
		cin>>a[i]>>b[i];
		rt[i]=i;
		sz[i]=b[i];
		Mx[i]=max(a[i]-b[i],0);
	}
	for (int i=1;i<=m;++i)
	{
		cin>>edge[i].u>>edge[i].v;
		if (a[edge[i].u]>a[edge[i].v])
			swap(edge[i].u,edge[i].v);
		edge[i].data=a[edge[i].v];
	}
	sort(edge+1,edge+m+1);
	for (int i=1;i<=m;++i)
		if (find(edge[i].u)!=find(edge[i].v))
			unionn(edge[i].u,edge[i].v);
	cout<<Mx[find(1)]+sz[find(1)]<<endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:35:26: error: no matching function for call to 'max(long long int, int)'
   35 |                 Mx[i]=max(a[i]-b[i],0);
      |                       ~~~^~~~~~~~~~~~~
In file included from /usr/include/c++/14/string:51,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 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:35:26: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   35 |                 Mx[i]=max(a[i]-b[i],0);
      |                       ~~~^~~~~~~~~~~~~
/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,
                 from a.cc:2:
/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:35:26: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   35 |                 Mx[i]=max(a[i]-b[i],0);
      |                       ~~~^~~~~~~~~~~~~