cheese

//Nguyen Huu Hoang Minh
#include <bits/stdc++.h>
#define sz(x) int(x.size())
#define all(x) x.begin(),x.end()
#define reset(x) memset(x, 0,sizeof(x))
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define N 105
#define remain(x) if (x > MOD) x -= MOD
#define ii pair<int, int>
#define iiii pair< ii , ii >
#define viiii vector< iiii >
#define vi vector<int>
#define vii vector< ii >
#define bit(x, i) (((x) >> (i)) & 1)
#define Task "test"
#define int long long

using namespace std;

typedef long double ld;
const int inf = 1e10;
const int minf = -1e10;

int n, t, k;
ii a[N];
int ans = 0;

bool cmp(ii a, ii b){
    return a.se > b.se;
}

void readfile()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);cout.tie(0);
    if (fopen(Task".inp","r"))
    {
        freopen(Task".inp","r",stdin);
        //freopen(Task".out","w",stdout);
    }
    cin >> n >> t >> k;
    for(int i=1; i<=n; i++) cin >> a[i].fi >> a[i].se;
    sort(a+1,a+1+n,cmp);
}

void calc(int high, int cc){
    vector<int> dp(high+10,0);
    for(int i=1; i<=high; i++){
        dp[i] = max(dp[i],dp[i-1]);
        for(int j=1; j<=n; j++){
            if (i>=a[j].se/5*4){
                dp[i] = max(dp[i],dp[i-a[j].se/5*4]+a[j].fi);
            }
        }
    }
    ans = max(ans,dp[high]+cc);
}

void proc()
{
    if (a[1].se>=k)
    {
        int i=1;
        while(a[i].se>=k){
            calc(t-a[i].se,a[i].fi);
            i++;
        }
        vector<int> dp(t+1,0);
        for(int s=1; s<=t; s++){
            for(int j=i; j<=n; j++){
                if (s-a[j].se>=0){
                    dp[s] = max(dp[s],dp[s-a[j].se]+a[j].fi);
                }
            }
        }
        ans = max(ans,dp[t]);
    }
    else{
        vector<int> dp(t+1,0);
        for(int i=1; i<=t; i++){
            for(int j=1; j<=n; j++){
                if (i-a[j].se>=0){
                    dp[i] = max(dp[i],dp[i-a[j].se]+a[j].fi);
                }
            }
        }
        ans = max(ans,dp[t]);
    }
    cout << ans;
}

signed main()
{
    readfile();
    proc();
    return 0;
}