Submission #486987

#	Time	Username	Problem	Language	Result	Execution time	Memory
486987		study	Bank (IZhO14_bank)	C++17	100 / 100	94 ms	8632 KiB

bank

#include <bits/stdc++.h>
using namespace std;

const int MAX_N = 20, MASK = 1<<20;

int person[MAX_N],bank[MAX_N],max_people[MASK],leftover[MASK];

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	int n,m;
	cin >> n >> m;
	for (int i=0; i<n; ++i){
		cin >> person[i];
	}
	for (int i=0; i<m; ++i){
		cin >> bank[i];
	}
	memset(max_people,-1,sizeof(max_people));
	max_people[0] = 0;
	for (int mask=0; mask<(1<<m); ++mask){
		if (max_people[mask] == n){
			cout << "YES";
			return 0;
		}
		if (max_people[mask] != -1){
			for (int banki=0; banki<m; ++banki){
				if (!(mask&(1<<banki))){
					if (leftover[mask]+bank[banki] == person[max_people[mask]]){
						leftover[mask+(1<<banki)] = 0;
						max_people[mask+(1<<banki)] = max_people[mask]+1;
					}
					else if (leftover[mask]+bank[banki] < person[max_people[mask]]){
						leftover[mask+(1<<banki)] = leftover[mask]+bank[banki];
						max_people[mask+(1<<banki)] = max_people[mask];
					}
				}
			}
		}
	}
	cout << "NO";
	return 0;
}

• Subtask 1: 19 / 19
• Subtask 2: 25 / 25
• Subtask 3: 27 / 27
• Subtask 4: 29 / 29