Submission #869961

#	Time	Username	Problem	Language	Result	Execution time	Memory
869961		TimAni	Bank (IZhO14_bank)	C++17	52 / 100	1068 ms	79940 KiB

bank

#include <algorithm>
#include <cassert>
#include <cstdio>
#include <iostream>
#include <string>
#include <vector>
#include <set>
#include <map>
#include <numeric>
#include <stack>
#include <queue>
#include <cmath>
#include <array>

using namespace std;
using ll = long long;

void setIO(string File_name) {
    cin.tie(0)->sync_with_stdio(0);
    if (File_name.size()) {
        freopen((File_name + ".in").c_str(), "r", stdin);
        freopen((File_name + ".out").c_str(), "w", stdout);
    }
}

void sol() {
    int n, m;
    cin >> n >> m;
    vector<int> a(n), b(m);
    for(int i = 0; i < n; i++){
        cin >> a[i];
    }
    for(int i = 0; i < m; i++){
        cin >> b[i];
    }
    map<int, vector<int>> possible_sums;
    for(int mask = 0; mask < (1 << m); mask++){
        ll sum = 0;
        for(int bit = 0; bit < m; bit++){
            if(mask & (1ll << bit)){
                sum += b[bit];
            }
        }
        possible_sums[sum].push_back(mask);
    }
    vector<vector<bool>> dp(1 << m, vector<bool>(n + 1));
    for(int mask = 0; mask < (1 << m); mask++){
        dp[mask][0] = 1;
    }
    for(int i = 1; i <= n; i++){
        int x = a[i - 1];
        vector<int> possibilities = possible_sums[x];
        for(auto el : possibilities){
            
            for(int mask = 0; mask < (1 << m); mask++){
                bool been = false;
                for(int bit = 0; bit < m; bit++){
                    if((el & (1 << bit)) && (mask & (1 << bit))){
                        been = true;
                        break;
                    }
                }
                if(!been){
                    if(dp[mask][i - 1]){
                        dp[el | mask][i] = true;
                    }
                }
            }
        }
    }
    for(int mask = 0; mask < (1 << m); mask++){
        if(dp[mask][n]){
            cout << "YES";
            return;
        }
    }
    cout << "NO";
}

int main() {
    setIO("");
    int T = 1;
    //cin >> T;
    while (T--) sol();
    return 0;
}

Compilation message (stderr)

bank.cpp: In function 'void setIO(std::string)':
bank.cpp:21:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |         freopen((File_name + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:22:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |         freopen((File_name + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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