Submission #1128486

#	Time	Username	Problem	Language	Result	Execution time	Memory
1128486		shidou26	Bank (IZhO14_bank)	C++17	100 / 100	80 ms	8652 KiB

bank

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

#define endl '\n'
#define sz(v) (int)v.size()
#define all(v) v.begin(), v.end()
#define filter(v) v.resize(unique(all(v)) - v.begin())
#define dbg(x) "[" #x " = " << (x) << "]"

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

template<typename T> bool maximize(T &a, T b) {
    if(a < b) {
        a = b;
        return true;
    }else return false;
}
template<typename T> bool minimize(T &a, T b) {
    if(a > b) {
        a = b;
        return true;
    }else return false;
}
template<typename T> T rand(T a, T b) {
    return uniform_int_distribution<T>(a, b)(rng);
}

typedef long long ll;
typedef pair<int, int> ii;
typedef pair<ll, int> li;

const int N = 20;

int n, m;
int a[N + 1], b[N];

ii dp[(1 << N) + 3];

void process() {
    for(int mask = 0; mask < (1 << m); mask++) dp[mask] = {INT_MAX, INT_MAX};

    dp[0] = {0, 0};
    for(int mask = 0; mask < (1 << m); mask++) {
        if(dp[mask].first == 0) {
            int id = dp[mask].second + 1;
            for(int i = 0; i < m; i++) if(!(mask >> i & 1) && a[id] >= b[i]) {
                minimize(dp[mask | (1 << i)], ii(a[id] - b[i], id));
            }
        }else {
            if(dp[mask] != ii(INT_MAX, INT_MAX)) {
                for(int i = 0; i < m; i++) if(!(mask >> i & 1) && dp[mask].first >= b[i]) {
                    minimize(dp[mask | (1 << i)], ii(dp[mask].first - b[i], dp[mask].second));
                }
            }
        }
    }

    for(int mask = 0; mask < (1 << m); mask++) {
        if(dp[mask].first == 0 && dp[mask].second == n) {
            return void(cout << "YES" << endl);
        }
    }

    cout << "NO" << endl;
}

void input() {
    cin >> n >> m;

    for(int i = 1; i <= n; i++) {
        cin >> a[i];
    }

    for(int i = 0; i < m; i++) {
        cin >> b[i];
    }
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    #define task "Date_A_Live"
    if(fopen(task".inp", "r")) {
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }

    int testcase = 1; // cin >> testcase;
    for(int i = 1; i <= testcase; i++) {
        input();
        process();
    }

    cerr << "Saa, watashtachi no deito hajimemashou" << endl;

    return 0;
}

/*
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*/

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:85:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   85 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:86:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   86 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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