Submission #433363

#	Time	Username	Problem	Language	Result	Execution time	Memory
433363		frodakcin	Jelly Flavours (IOI20_jelly)	C++17	100 / 100	62 ms	460 KiB

jelly

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

bool ckmax(auto& a, const auto& b) {return b>a?a=b,1:0;}
bool ckmin(auto& a, const auto& b) {return b<a?a=b,1:0;}

const int MN = 2e3+10;
const int MV = 1e4+10;

struct st
{
	public:
		int v, bv;
		st inc() {return {v+1, bv};}
		void buy(int cost) {++v, bv-=cost;}
		bool operator > (const st& o) const {return v > o.v || !(o.v > v) && bv > o.bv;}
} dp[MV];

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

	std::vector<int> ord(N);
	std::iota(ord.begin(), ord.end(), 0);
	std::sort(ord.begin(), ord.end(), [&](int u, int v){return b[u]<b[v];});

	for(int i=0;i<=x;++i)
		dp[i]={0,y};
	for(int i=0;i<N;++i)
	{
		int k=ord[i];
		for(int j=0;j<=x;++j)
		{
			if(dp[j].bv >= b[k]) dp[j].buy(b[k]);
			if(j+a[k]<=x) ckmax(dp[j], dp[j+a[k]].inc());
		}
	}
	return dp[0].v;
}

Compilation message (stderr)

jelly.cpp:7:12: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
    7 | bool ckmax(auto& a, const auto& b) {return b>a?a=b,1:0;}
      |            ^~~~
jelly.cpp:7:27: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
    7 | bool ckmax(auto& a, const auto& b) {return b>a?a=b,1:0;}
      |                           ^~~~
jelly.cpp:8:12: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
    8 | bool ckmin(auto& a, const auto& b) {return b<a?a=b,1:0;}
      |            ^~~~
jelly.cpp:8:27: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
    8 | bool ckmin(auto& a, const auto& b) {return b<a?a=b,1:0;}
      |                           ^~~~
jelly.cpp: In member function 'bool st::operator>(const st&) const':
jelly.cpp:19:69: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   19 |   bool operator > (const st& o) const {return v > o.v || !(o.v > v) && bv > o.bv;}
      |                                                          ~~~~~~~~~~~^~~~~~~~~~~~

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