#include <bits/stdc++.h>
#include <math.h>
#include <cmath>

using namespace std;
using ll =long long;
using vi = vector<int>; 
using vvi = vector<vi>; 
using vl = vector<ll>; 
using vvl = vector<vl>; 
using vs = vector<string>;
using vvs = vector<vs>; 
using vc = vector<char>;
using vvc = vector<vc>; 
using vb = vector<bool>;
using vvb = vector<vb>; 

template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }
const long long INF = 1LL << 60;
typedef pair<int, int> PR;

#define rep(i,n) ;for( int i =0; i < n ; i ++)
#define all(a) a.begin(),a.end()
#define pb(a) push_back(a)
#define pd(a) printf("%.10f\n",a)
#define mem(a) memset(a,0,sizeof(a))
#define fr(i,a,b) for(int i=a;i<b;i++)
#define pri(a)  printf("%.14lf\n",a);
#define MOD 1000000007
bool is_int_lround(double x){
  return std::lround(x)==x;
}
ll keta(ll x){
  ll n=0;
  while(x>0){
    x /=10 ;
    n ++;
  }
  return n;
}

ll conbi(int n,int m){
  
  cin>>n>>m;
  vector<ll> a(100);
  a[0] =1;
  for(int i=0;i<14;i++){
    a[i+1]=a[i]*(i+1);
  }
  return a[n] /(a[m] *a[n-m]);
}

long long modpow(long long a, long long n, long long mod) {
    long long res = 1;//繰り返し二乗法
    while (n > 0) {
        if (n & 1) res = res * a % mod;
        a = a * a % mod;
        n >>= 1;
    }
    return res;
}
ll kaijo(ll x){
  ll z=1;
  if(x==0){
    return 1;
  }
  while(x>0){
    z *=x;
    z %=MOD;
    x--;
  }
  return z;
}
ll yakusu_num(ll n){
  vl yakusu(n+1,1);
  for(ll i=2;i*i<=n;i++){ 
    while(n%i==0){
      n /=i;
      yakusu[i]++;
    }
  }
  if(n!=1)yakusu[n]++;
  ll num=1;
  for(ll i=0;i <=n;i++){
    num*=yakusu[i];
  }
  return num;
}
 

//cout<<""<<endl;
int main(){
  ll A,B;cin>>A>>B;
  cout<<max(2*A+100-B,0LL)<<endl;

  
}




#pragma GCC target("avx2")
#pragma GCC optimize ("O3")
#pragma GCC optimize ("unroll-loops")
#include<bits/stdc++.h>

#define int ll
#define f			first
#define sz(a)       ((int)(a).size())
#define s			second
#define all(v)		v.begin(),v.end()
#define pii 		pair<int,int>
#define vpii 		vector<pii>
#define eb			emplace_back
#define pb			push_back
#define fo(i,n)		for(int i=0;i<n;i++)
#define Fo(i,k,n)	for(int i=k;i<n;i++)
#define vi			vector<int>

using namespace std;
using ll  = long long;
using lld = long double;

const int oo = 0x3f3f3f3f;
const ll MOD = 1000000007;

signed main(){

#ifndef ONLINE_JUDGE
	//freopen("in.txt" , "r" , stdin);
#endif
	ios_base::sync_with_stdio(0);cin.tie(0);


	int n , C;
	cin >> n >> C;
	vi a(n) , b(n) , c(n);
	fo(i , n) cin >> a[i] >> b[i] >> c[i];
	map<int,int> hm;
	int cur = 0 , prev = 0 , ans = 0;
	fo(i , n){
		hm[b[i] + 1] -= c[i];
		hm[a[i]] += c[i];
	}
	for(auto [k , v] : hm){
		ans += min(cur , C) * (k - prev);
		cur += v;
		prev = k;
	}
	cout << ans << '\n';
    return 0;
}




