Submission #1224419

#	Time	Username	Problem	Language	Result	Execution time	Memory
1224419		khoile08	Bank (IZhO14_bank)	C++20	100 / 100	94 ms	8640 KiB

bank

#include <bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for(int i = a; i <= b; i++)
#define FOD(i,a,b) for(int i = a; i >= b; i--)
//#define int long long
#define fi first
#define se second
#define pb push_back
#define ll long long
#define ull unsigned long long
#define db double
#define lcm(a,b) a / __gcd(a, b) * b
#define ii pair<int,int>
#define iii pair<int,pair<int,int>>
#define iv pair<pair<int,int>,pair<int,int>>
#define sq(a) (a) * (a)
#define MASK(i) (1LL << i)
#define task "task"

const int inf = 1e9;
const ll INF = 1e18;
const int mod = 1e9 + 7;
const int N = 20;

int n, m;
int a[N + 5], b[N + 5];
ii dp[MASK(N) + 5];

void Solve() {
    FOR(mask, 1, MASK(m) - 1) dp[mask] = {-1, 0};
    FOR(mask, 1, MASK(m) - 1) {
        FOR(i, 0, m - 1) {
            if((mask >> i) & 1) {
                if(dp[mask ^ (1 << i)].fi == -1) continue;
                if(dp[mask ^ (1 << i)].se + b[i + 1] < a[dp[mask ^ (1 << i)].fi + 1]) {
                    dp[mask] = {dp[mask ^ (1 << i)].fi, dp[mask ^ (1 << i)].se + b[i + 1]};
                }
                else if(dp[mask ^ (1 << i)].se + b[i + 1] == a[dp[mask ^ (1 << i)].fi + 1]) {
                    dp[mask] = {dp[mask ^ (1 << i)].fi + 1, 0};
                }
            }
        }
        if(dp[mask].fi == n) {
            cout << "YES" << '\n';
            return;
        }
    }
    cout << "NO" << '\n';
}

signed main() {
    if(fopen(task".inp", "r")) {
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    int test = 1;
//    cin >> test;
    while(test--) {
        cin >> n >> m;
        FOR(i, 1, n) cin >> a[i];
        FOR(i, 1, m) cin >> b[i];
        Solve();
    }
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:53:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   53 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:54:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   54 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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