Submission #316951

#	Time	Username	Problem	Language	Result	Execution time	Memory
316951		mihai145	Jelly Flavours (IOI20_jelly)	C++14	100 / 100	243 ms	78840 KiB

jelly

#include "jelly.h"
#include <vector>
#include <algorithm>

const int NMAX = 2000;
const int XMAX = 10000;
const int INF = 10 * XMAX;

std::vector < std::pair <int, int> > pairs;
int dp[NMAX + 2][XMAX + 2];

int find_maximum_unique(int x, int y, std::vector<int> a, std::vector<int> b) {
	int n = (int)a.size();

	for(int i = 0; i < n; i++)
        pairs.push_back({a[i], b[i]});

	sort(pairs.begin(), pairs.end());

	for(int i = 1; i <= n; i++)
        for(int bugA = 0; bugA <= x; bugA++)
            dp[i][bugA] = INF;

    for(int i = 0; i < n; i++)
        for(int bugA = 0; bugA <= x; bugA++)
            if(dp[i][bugA] <= y)
            {
                ///cumpar i + 1 din A
                if(bugA + pairs[i].first <= x)
                    dp[i + 1][bugA + pairs[i].first] = std::min(dp[i + 1][bugA + pairs[i].first], dp[i][bugA]);

                ///cumpar i + 1 din B
                if(dp[i][bugA] + pairs[i].second <= y)
                    dp[i + 1][bugA] = std::min(dp[i + 1][bugA], dp[i][bugA] + pairs[i].second);
            }

    std::vector <int> sufb;
    int sol = 0;

    for(int i = n; i >= 0; i--)
        {
            int minY = INF;
            for(int bugA = 0; bugA <= x; bugA++)
                minY = std::min(minY, dp[i][bugA]);

            if(i + 1 <= n)
                sufb.push_back(pairs[i].second);

            if(minY <= y) {
                int placed = i; ///pref

                sort(sufb.begin(), sufb.end());

                int remBudget = y - minY;
                for(auto it : sufb)
                if(remBudget >= it) {
                    remBudget -= it;
                    placed++;
                } else
                    break;

                sol = std::max(sol, placed);
            }
        }

	return sol;
}

• Subtask 1: 11 / 11
• Subtask 2: 24 / 24
• Subtask 3: 9 / 9
• Subtask 4: 10 / 10
• Subtask 5: 14 / 14
• Subtask 6: 32 / 32