Submission #337884

#	Time	Username	Problem	Language	Result	Execution time	Memory
337884		kutbilim_one	Bank (IZhO14_bank)	C++14	100 / 100	566 ms	86800 KiB

bank

#include <bits/stdc++.h>

using namespace std;

#define endl '\n'
#define all(x) x.begin(), x.end()

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie();

	int n, m;
    cin >> n >> m;

    vector<int> a(n), b(m);
    for(int i = 0; i < n; i++) cin >> a[i];
    for(int j = 0; j < m; j++) cin >> b[j];

    int maxx = *max_element(all(a));
    vector<int> pass[1 + maxx];
    for(int bin = 1; bin < (1 << m); bin++){
    	int i = 0, sum = 0, temp = bin;
    	while(temp){
    		if(temp & 1) sum += b[i];
    		temp >>= 1;
    		i++;
    	}
    	if(sum <= maxx) pass[sum].push_back(bin);
    }

    vector< vector<int> > dp(n, vector<int> (1 << m, false));

    for(int i = 0; i < pass[a[0]].size(); i++){
    	dp[0][pass[a[0]][i]] = true;
    }

    for(int i = 1; i < n; i++){
    	int good = 0;
    	for(int bin = 0; bin < (1 << m); bin++){
    		if(!dp[i-1][bin]) continue;
    		for(auto last : pass[a[i]])
    			if(!(last & bin)) dp[i][last|bin] = good = true;
    	}
    	if(!good) break;
    }

    bool ans = false;
    for(int i = 0; !ans && i < (1 << m); i++){
    	if(dp[n-1][i]) ans = true;
    }

    if(ans) cout << "YES";
    else cout << "NO";


	return 0;
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:33:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |     for(int i = 0; i < pass[a[0]].size(); i++){
      |                    ~~^~~~~~~~~~~~~~~~~~~

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