Submission #899503

#	Time	Username	Problem	Language	Result	Execution time	Memory
899503		nasir_bashirov	Bank (IZhO14_bank)	C++11	71 / 100	1053 ms	68372 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;
vi can[25];

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 : can[i]){
        if((msk & mask) == 0){
            if(f(i + 1, (msk | mask)))  return dp[i][mask] = 1;
        }
    }
    return dp[i][mask] = 0;
}

signed main(){
    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;
            int s = 0;
            for(int j = 0; j < m; j++){
                if((1 << j) & mask){
                    s += b[j + 1];
                }
            }
            if(s == a[i]){
                can[i].push_back(mask);
            }
        }
    }
    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:37:60: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   37 |             if(f(i + 1, (msk | mask)))  return dp[i][mask] = 1;
      |                                                ~~~~~~~~~~~~^~~
bank.cpp:40:24: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   40 |     return dp[i][mask] = 0;
      |            ~~~~~~~~~~~~^~~

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