Submission #899439

#	Time	Username	Problem	Language	Result	Execution time	Memory
899439		nasir_bashirov	Bank (IZhO14_bank)	C++17	71 / 100	1082 ms	84596 KiB

bank

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

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

#define db long double
#define ll long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define vi vector<int>
#define vl vector<ll>
#define vii vector<pii>
#define vll vector<pll>
#define endl '\n'
#define all(x) x.begin(), x.end()
#define fastio\
    ios_base::sync_with_stdio(0);\
    cin.tie(0);\
    cout.tie(0)\


int a[25], b[25], dp[25][(1 << 20) + 5], n, m;

bool f(int i, int mask){
    if(i == n + 1)  return true;
    if(dp[i][mask] != -1)   return dp[i][mask];
    vi left;
    for(int j = 0; j < m; j++){
        if(!((1 << j) & mask)){
            left.push_back(j);
        }
    }
    for(int msk = 0; msk < (1 << left.size()); msk++){
        int s = 0;
        for(int j = 0; j < left.size(); j++){
            if((1 << j) & msk){
                s += b[left[j] + 1];
            }
        }
        // cout << msk << " " << s << endl;
        if(s == a[i]){
            int to = mask;
            for(int j = 0; j < left.size(); j++){
                if((1 << j) & msk){
                    to |=  (1 << left[j]);
                }
            }
            if(f(i + 1, to)){
                // cout << i << " " << mask << endl;
                return dp[i][mask] = 1;
            }
        }
    }
    return dp[i][mask] = 0;
}

signed main(){
    fastio;
    cin >> n >> m;
    for(int i = 1; i <= n; i++){
        cin >> a[i];
    }
    for(int i = 1; i <= m; i++){
        cin >> b[i];
    }
    for(int i = 1; i <= n; i++){
        for(int mask = 0; mask < (1 << m); mask++){
            dp[i][mask] = -1;
        }
    }
    f(1, 0);
    for(int mask = 0; mask < (1 << m); mask++){
        if(dp[n][mask] == 1){
            cout << "YES";
            return 0;
        }
    }
    cout << "NO";
}

Compilation message (stderr)

bank.cpp: In function 'bool f(int, int)':
bank.cpp:36:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |         for(int j = 0; j < left.size(); j++){
      |                        ~~^~~~~~~~~~~~~
bank.cpp:44:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |             for(int j = 0; j < left.size(); j++){
      |                            ~~^~~~~~~~~~~~~
bank.cpp:51:36: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   51 |                 return dp[i][mask] = 1;
      |                        ~~~~~~~~~~~~^~~
bank.cpp:55:24: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   55 |     return dp[i][mask] = 0;
      |            ~~~~~~~~~~~~^~~

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