Submission #1039748

#	Time	Username	Problem	Language	Result	Execution time	Memory
1039748		FanOfWilliamLin	Bank (IZhO14_bank)	C++14	100 / 100	86 ms	10892 KiB

bank

#include <bits/stdc++.h>
using namespace std;
 
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;

/*template <class T> using oset=tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
//- insert(x),erase(x)
//- find_by_order(k): return iterator to the k-th smallest element
//- order_of_key(x): the number of elements that are strictly smaller*/

#define ll long long
#define ld long double
#define ar array
#define vt vector
#define pb push_back
#define bit(i, x) ((x>>i)&1ULL)
#define pf push_front
#define all(v) v.begin(), v.end()
#define lla(v) v.rbegin(), v.rend()

mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());

const int MOD=1e9+7;
//const int MOD=998244353;

ll floor_div(ll x, ll y) {
	assert(y!=0);
	if (y<0) {
		y=-y;
		x=-x;
	}
	if (x>=0) return x/y;
	return (x+1)/y-1;
}

ll ceil_div(ll x, ll y) {
	assert(y!=0);
	if (y<0) {
		y=-y;
		x=-x;
	}
	if (x<=0) {
		return x/y;
	}
	return (x-1)/y+1;
}

const int mxN=25;
int n, m;
int cover[1<<mxN], lft[1<<mxN], sal[mxN], notes[mxN];

void solve() {
	//solve here
	cin >> n >> m;
	for(int i=0; i<n; ++i) {
		cin >> sal[i];
	}
	for(int i=0; i<m; ++i) {
		cin >> notes[i];
	}
	for(int i=0; i<(1<<m); ++i) {
		cover[i]=-1;
		lft[i]=-1;
	}
	cover[0]=0;
	lft[0]=0;
	for(int msk=0; msk<(1<<m); ++msk) {
		for(int i=0; i<m; ++i) {
			if(!bit(i, msk)) {
				continue;
			}
			int prv=msk^(1<<i);
			if(cover[prv]==-1) {
				continue;
			}
			if(notes[i]+lft[prv]<sal[cover[prv]]) {
				lft[msk]=lft[prv]+notes[i];
				cover[msk]=cover[prv];
			}
			else if(notes[i]+lft[prv]==sal[cover[prv]]) {
				cover[msk]=cover[prv]+1;
				lft[msk]=0;
			}
		}
		if(cover[msk]==n) {
			cout << "YES\n";
			return;
		}
	}
	cout << "NO\n";
}
 
signed main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
 
	//freopen("template.inp", "r", stdin);
	//freopen("template.out", "w", stdout);	

	int TC=1;
	//cin >> TC;
	while(TC--) {
		solve();
	}
}

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