我之前不小心写错了，然后后面检查时才发现写错了，但是那时候我提交过一次，发现这样子写也可以ac。

	for(i=1;i<=n;i++)
	{
		ll x, y, z;
		cin>>x>>y>>z;
		d[x] += z;
		d[y + 1] -= z;
	}

完整代码是这样子的

#include<iostream>
#include<cstring>
#include<cmath>
#include<algorithm>
#include<string.h>
#include<map>
#include<queue>
#include<vector>
#include<set>
using namespace std;
typedef long long int ll;
typedef unsigned long long int ull;
const ll mm = 5e6+ 60;
ll n, p, a[mm],d[mm],mina;
int main()
{
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	cin >> n >> p;
	ll i;
	for (i = 1; i <= n; i++)
	{
		cin >> a[i];
		d[i] = a[i] - a[i - 1];
	}

	for(i=1;i<=n;i++)
	{
		ll x, y, z;
		cin>>x>>y>>z;
		d[x] += z;
		d[y + 1] -= z;
	}
	mina = d[1];
	for (int i = 1; i <= n; i++)
	{
		a[i] = a[i - 1] + d[i];
		mina = min(a[i], mina);
	}
	cout << mina;
	return 0;
}