Submission #17918

#	Time	Username	Problem	Language	Result	Execution time	Memory
17918		Adilkhan	Bank (IZhO14_bank)	C++98	71 / 100	1066 ms	4832 KiB

bank

#include <bits/stdc++.h>

#define pb push_back
#define endl "\n"
#define mp make_pair 
#define fi first
#define se second
#define all(x) x.begin(), x.end()
#define fname ""
#define sz(x) (int)(x.size())

typedef long long ll;

using namespace std;

const ll N = (ll)(5e5) + 322;
const ll INF = (ll)(1e9);
const ll mod = (ll)(1e9) + 7;
const double eps = 1e-9;

int n, m, x, nz, sum, q[1248576], suff[33];

vector <int> a, b; 

void calc(int pmsk, int x) {
	if (x == n) {
		puts("YES"); exit(0);
	}
	for (int mask = 0; mask < (1 << m); ++mask) {
		if ((mask & pmsk)) {continue;}
		if (m - (__builtin_popcount(mask) + __builtin_popcount(pmsk)) < (n - x - 1)) {continue;}	
		//if (q[((1 << m) - 1) ^ (pmsk ^ mask)] < suff[x + 1]) {continue;}
		if (q[mask] == a[x]) {
			calc(pmsk ^ mask, x + 1);
		}
	}
}

void precalc() {
	for (int mask = 0; mask < (1 << m); ++mask) {
		sum = 0;
		for (int i = 0; i < m; ++i) {
			if ((1 << i) & mask) {
				sum += b[i];			
			}		
		}
		q[mask] = sum;	
	}  
}

int main () {
	//ios_base :: sync_with_stdio (false); cin.tie(0);
	//freopen(fname".in", "r", stdin);
	//freopen(fname".out", "w", stdout);
	scanf("%d%d", &n, &m);
	for (int i = 1; i <= n; ++i) {
		scanf("%d", &x); a.pb(x);
	}
	for (int i = 1; i <= m; ++i) {
		scanf("%d", &x); b.pb(x);
	}
	for (int i = n - 1; i >= 0; --i) {suff[i] = suff[i + 1] + a[i];}
	precalc();
	if (n > m) {
		puts("NO");	return 0;
	}
	if (n == m) {
		sort(all(a)); sort(all(b));
		if (a == b) {
			puts("YES");
		}else {
			puts("NO");
		}
		return 0;
	}
	sort(all(a));
//	reverse(all(a));
	calc(0, 0);
  puts("NO");
  return 0;
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:55:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &n, &m);
  ~~~~~^~~~~~~~~~~~~~~~
bank.cpp:57:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &x); a.pb(x);
   ~~~~~^~~~~~~~~~
bank.cpp:60:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &x); b.pb(x);
   ~~~~~^~~~~~~~~~

• Subtask 1: 19 / 19
• Subtask 2: 25 / 25
• Subtask 3: 27 / 27
• Subtask 4: 0 / 29