Submission #921138

#	Time	Username	Problem	Language	Result	Execution time	Memory
921138		shoryu386	Kitchen (BOI19_kitchen)	C++17	72 / 100	1064 ms	99316 KiB

kitchen

#include <bits/stdc++.h>
using namespace std;
 
#define int long long
 
main(){
	ios_base::sync_with_stdio(0); cin.tie(0);
	
	int n, m, k; cin >> n >> m >> k;
	
	int buckets[n], balls[m];
	
	for (int x = 0; x < n; x++) cin >> buckets[x];
	for (int x = 0; x < m; x++) cin >> balls[x];
	
	#define IMP cout << "Impossible"; return 0;
	
	bool dead = false;
	for (int x = 0; x < n; x++){
		if (buckets[x] < k){
			dead = true;
		}
	}
	if (dead) {IMP;}
	
	int bucketsum = 0;
	for (int x = 0; x < n; x++){
		bucketsum += buckets[x];
	}
	
	
	#define BSMAX 100000
	deque<bitset<BSMAX>> hmm;
	
	bitset<BSMAX> init;
	hmm.push_back(init);
	int firstbucket = n*k, lastbucket = n*k;
	
	hmm[n*k - firstbucket][0] = 1;
	
	
	sort(balls, balls+m, greater<int>());
	int sum = 0, ssum[m];
	for (int x = m-1; x > -1; x--){
		sum += min(n, balls[x]);
		ssum[x] = sum;
	}
	sum = 0; int psum[m];
	for (int x = 0; x < m; x++){
		sum += balls[x];
		psum[x] = sum;
	}
	
	for (int z = n*k; z <= n*k; z++){
		
		while (firstbucket > max(0LL, z - min(balls[0], n)) ){
			hmm.push_front(init);
			firstbucket--;
		}
		
		while (lastbucket > min(n*k, ssum[0])){
			hmm.pop_back();
			lastbucket--;
		}
		hmm[max(0LL, z - min(balls[0], n)) - firstbucket] |= (hmm[z - firstbucket] << balls[0]);
	}
	
	for (int x = 1; x < m; x++){
		while (firstbucket > max(0LL, max(0LL, n*k - psum[x-1]) - min(balls[x], n))){
			hmm.push_front(init);
			firstbucket--;
		}
		
		while (lastbucket > min(n*k, ssum[x])){
			hmm.pop_back();
			lastbucket--;
		}
		
		for (int z = max(0LL, n*k - psum[x-1]); z <= min(n*k, ssum[x]); z++){
			
			assert(max(0LL, z - min(balls[x], n)) >= firstbucket);
			assert(z <= lastbucket);
			
			hmm[max(0LL, z - min(balls[x], n)) - firstbucket] |= (hmm[z - firstbucket] << balls[x]);
		}
	}
	
	
	int ans = -1;
	for (int x = bucketsum; x < BSMAX; x++){
		if (hmm[0][x]){
			ans = x-bucketsum;
			break;
		}
	}
		
	if (ans == -1) cout << "Impossible";
	else cout << ans;
	
}

Compilation message (stderr)

kitchen.cpp:6:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    6 | main(){
      | ^~~~

• Subtask 1: 9 / 9
• Subtask 2: 22 / 22
• Subtask 3: 20 / 20
• Subtask 4: 21 / 21
• Subtask 5: 0 / 28