Submission #860771

#	Time	Username	Problem	Language	Result	Execution time	Memory
860771		browntoad	Two Dishes (JOI19_dishes)	C++14	10 / 100	115 ms	31836 KiB

dishes

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define int ll
#define pii pair<int, int>
#define ppi pair<pii, int>
#define pip pair<int, pii>
#define pb push_back
#define ALL(x) (x).begin(), (x).end()
#define FOR(i, a, b) for (int i = (a); i < (b); i++)
#define REP(i, n) FOR(i, 0, n)
#define REP1(i, n) FOR(i, 1, n+1)
#define RREP(i, n) for (int i = (n)-1; i >= 0; i--)
#define SZ(x) (int)((x).size())
 
const ll maxn = 2005;
const ll inf = (1ll<<60);
const ll mod = 1e9+7;
 
int n, m;
int dp[maxn][maxn];
signed main(){
	ios::sync_with_stdio(false), cin.tie(0), cout.tie(0);
	cin>>n>>m;
	vector<int> a(n+1), s(n+1), p(n+1);
	vector<int> b(m+1), t(m+1), q(m+1);
	REP1(i, n) cin>>a[i]>>s[i]>>p[i];
	REP1(j, m) cin>>b[j]>>t[j]>>q[j];
	REP1(i, n) a[i] += a[i-1];
	REP1(j, m) b[j] += b[j-1];
 
	if (n > 2000 || m > 2000){
		REP1(i, n) p[i] += p[i-1];
		REP1(j, m) q[j] += q[j-1];
		int k = s[1];
		int mx = -inf;
		int tot = 0;
		REP(i, n+1){
			if (a[i] <= k) tot = p[i];			
			int id = upper_bound(ALL(b), k-a[i]) - b.begin();
			id = max(0ll, id-1);
			mx = max(mx, q[id] + tot);
		}
      	tot = 0;
      	REP(i, m+1){
			if (b[i] <= k) tot = q[i];			
			int id = upper_bound(ALL(a), k-b[i]) - a.begin();
			id = max(0ll, id-1);
			mx = max(mx, p[id] + tot);
		}
		cout<<mx<<endl;
		return 0;
	}
 
	REP(i, n+1){
		REP(j, m+1){
			if (i > 0) dp[i][j] = max(dp[i][j], dp[i-1][j] + (a[i]+b[j] <= s[i]));
			if (j > 0) dp[i][j] = max(dp[i][j], dp[i][j-1] + (a[i]+b[j] <= t[j]));
		}
	}
	cout<<dp[n][m]<<endl;
 
 
}

• Subtask 1: 0 / 5
• Subtask 2: 3 / 3
• Subtask 3: 7 / 7
• Subtask 4: 0 / 39
• Subtask 5: 0 / 11
• Subtask 6: 0 / 9
• Subtask 7: 0 / 17
• Subtask 8: 0 / 9