#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define ld long double
#define ar array

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;

template <typename T> using oset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

#define vt vector
#define pb push_back
#define all(c) (c).begin(), (c).end()
#define sz(x) (int)(x).size()

#define F_OR(i, a, b, s) for (int i=(a); (s)>0?i<(b):i>(b); i+=(s))
#define F_OR1(e) F_OR(i, 0, e, 1)
#define F_OR2(i, e) F_OR(i, 0, e, 1)
#define F_OR3(i, b, e) F_OR(i, b, e, 1)
#define F_OR4(i, b, e, s) F_OR(i, b, e, s)
#define GET5(a, b, c, d, e, ...) e
#define F_ORC(...) GET5(__VA_ARGS__, F_OR4, F_OR3, F_OR2, F_OR1)
#define FOR(...) F_ORC(__VA_ARGS__)(__VA_ARGS__)
#define EACH(x, a) for (auto& x: a)

template<class A> void read(vt<A>& v);
template<class A, size_t S> void read(ar<A, S>& a);
template<class T> void read(T& x) {
	cin >> x;
}
void read(double& d) {
	string t;
	read(t);
	d=stod(t);
}
void read(long double& d) {
	string t;
	read(t);
	d=stold(t);
}
template<class H, class... T> void read(H& h, T&... t) {
	read(h);
	read(t...);
}
template<class A> void read(vt<A>& x) {
	EACH(a, x)
		read(a);
}
template<class A, size_t S> void read(array<A, S>& x) {
	EACH(a, x)
		read(a);
}

string to_string(char c) {
	return string(1, c);
}
string to_string(bool b) {
	return b?"true":"false";
}
string to_string(const char* s) {
	return string(s);
}
string to_string(string s) {
	return s;
}
string to_string(vt<bool> v) {
	string res;
	FOR(sz(v))
		res+=char('0'+v[i]);
	return res;
}

template<size_t S> string to_string(bitset<S> b) {
	string res;
	FOR(S)
		res+=char('0'+b[i]);
	return res;
}
template<class T> string to_string(T v) {
    bool f=1;
    string res;
    EACH(x, v) {
		if(!f)
			res+=' ';
		f=0;
		res+=to_string(x);
	}
    return res;
}

template<class A> void write(A x) {
	cout << to_string(x);
}
template<class H, class... T> void write(const H& h, const T&... t) { 
	write(h);
	write(t...);
}
void print() {
	write("\n");
}
template<class H, class... T> void print(const H& h, const T&... t) { 
	write(h);
	if(sizeof...(t))
		write(' ');
	print(t...);
}

void DBG() {
	cerr << "]" << endl;
}
template<class H, class... T> void DBG(H h, T... t) {
	cerr << to_string(h);
	if(sizeof...(t))
		cerr << ", ";
	DBG(t...);
}
#ifdef _DEBUG
#define dbg(...) cerr << "LINE(" << __LINE__ << ") -> [" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__)
#else
#define dbg(...) 0
#endif

template<class T> void offset(ll o, T& x) {
	x+=o;
}
template<class T> void offset(ll o, vt<T>& x) {
	EACH(a, x)
		offset(o, a);
}
template<class T, size_t S> void offset(ll o, ar<T, S>& x) {
	EACH(a, x)
		offset(o, a);
}

mt19937 mt_rng(chrono::steady_clock::now().time_since_epoch().count());
ll randint(ll a, ll b) {
	return uniform_int_distribution<ll>(a, b)(mt_rng);
}
const int d4i[4]={-1, 0, 1, 0}, d4j[4]={0, 1, 0, -1};
const int d8i[8]={-1, -1, 0, 1, 1, 1, 0, -1}, d8j[8]={0, 1, 1, 1, 0, -1, -1, -1};
ll mod=1e9+7;
const int N=1e6+5;
const ld PI=2*acos(0.0);
 
ll modpow(ll a, ll b){
ll res=1; a%=mod;
while(b){
if(b&1){ res=(res*a)%mod;}
a=(a*a)%mod;
b>>=1; 
}
return res;
}
 
#define lcm(a,b) ((a)*(b))/(__gcd(a,b))
 
bool compare(array<int,2> a,array<int,2> b){
return a[0]<b[0]; 
}
void solve() {
int n,t; read(n,t); 
vt<array<int,2> > td(n+1); 
FOR(i,1,n+1) read(td[i][0],td[i][1]);
sort(++td.begin(),td.end(),compare);
int siz=(*--td.end())[0]+t+5; 
vt<int> dp(siz,0);
vt<int> pre(siz,0);
FOR(i,1,n+1){
FOR(j,1,siz){ 
if(j-td[i][0]<0||j-td[i][0]>=t) { dp[j]=pre[j];}
else{ dp[j]=max(pre[j],pre[j-td[i][0]]+td[i][1]);}
} 
FOR(j,1,siz){ pre[j]=dp[j]; dp[j]=0; }
//dbg(i,pre); 
}   
print(*max_element(all(pre))); 
}

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	solve(); 
}

#include<bits/stdc++.h>
using namespace std;
//#pragma region atcoder
/*#include <atcoder/dsu>
using namespace atcoder;*/
//using mint = modint998244353;
//These are for segment tree
/*int op(int a, int b){return max(a, b);}
int e(){return -1;}
bool f(int v){ return v < target;}
*/
#pragma endregion
#pragma region macros
using ll = long long;
using vi = vector<int>;
using vs = vector<string>;
using vl = vector<ll>;
using vb = vector<bool>;
using vvi = vector<vector<int>>;
using vvl = vector<vector<ll>>;
#define rep(i, n) for(int i = 0; i < n; i++)
#define rrep(i, n) for(int i = n - 1; i >= 0; i--)
#define all(x) (x).begin(), (x).end()
#define sz(x) ((int)(x).size())
#pragma endregion
#pragma region debug for var, v, vv
#define debug(var)  do{std::cout << #var << " : ";view(var);}while(0)
template<typename T> void view(T e){std::cout << e << std::endl;}
template<typename T> void view(const std::vector<T>& v){for(const auto& e : v){ std::cout << e << " "; } std::cout << std::endl;}
template<typename T> void view(const std::vector<std::vector<T> >& vv){cout << endl;int cnt = 0;for(const auto& v : vv){cout << cnt << "th : "; view(v); cnt++;} cout << endl;}
#pragma endregion

const ll mod = 1000000007;
const int inf = 1001001001;
const ll INF = 1001001001001001001;

template<class T>bool chmax(T &a, const T b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T b) { if (b<a) { a=b; return 1; } return 0; }
ll modpow(ll a, ll p){ll ret = 1; while(p){if(p & 1){ret = ret * a % mod;} a = a * a % mod; p >>= 1;} return ret;}

int dx[4]={1,0,-1,0};
int dy[4]={0,1,0,-1};

/*-----------------------------------------------------------------------------------------------------*/
int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);
	int n, t; cin >> n >> t;
	vector<pair<int, int>> p(n);
	rep(i,n) cin >> p[i].first >> p[i].second;
	sort(all(p));
	vvi dp(n + 1, vi(t));
	rep(i,n){
		rep(j,t){
			chmax(dp[i + 1][j], dp[i][j]);
			if(j - p[i].first >= 0) chmax(dp[i + 1][j], dp[i][j - p[i].first] + p[i].second);
		}
	}
	int ans = 0;
	rep(i,n){
		ans = max(ans, dp[i][t - 1] + p[i].second);
	}
	cout << ans << endl;
}