Submission #335646

#	Time	Username	Problem	Language	Result	Execution time	Memory
335646		Olerinskiy	Bank (IZhO14_bank)	C++14	100 / 100	540 ms	12868 KiB

bank

#include <iostream>
#include <iomanip>
#include <algorithm>
#include <bitset>
#include <set>
#include <unordered_set>
#include <map>
#include <unordered_map>
#include <cmath>
#include <time.h>
#include <random>
#include <string>
#include <cassert> 
#include <vector>
#include <ostream>
#include <istream>
#include <stack>
#include <deque>
#include <queue>
#include <functional>
#include <chrono>
#include <stack>

using namespace std;

// #define int long long
#define pb push_back
#define all(a) (a).begin(), (a).end()
#define pii pair<int, int>
#define ld long double

ostream& operator<< (ostream &out, const vector<int> &b) {
    for (auto k : b) out << k << " ";
    return out;
}

istream& operator>> (istream& in, pii& b) {
    in >> b.first >> b.second;
    return in;
}

ostream& operator<< (ostream& out, const pii& b) {
    out << "{" << b.first << ", " << b.second << "}";
    return out;
}

template <typename T1, typename T2> inline bool chkmin(T1 &x, const T2 &y) {if (x > y) {x = y; return 1;} return 0;}
template <typename T1, typename T2> inline bool chkmax(T1 &x, const T2 &y) {if (x < y) {x = y; return 1;} return 0;}


#ifdef LOCAL
    #define dbg(x) cout << #x << " : " << (x) << endl;
    // const int INF = 1e18;
    // const int mod = 2600000069;
    // const int p = 10;
#else
    #define dbg(x) 57
    // const int INF = 1e18;
    // const int mod = 2600000069;  
    // const int p = 179;
#endif

const ld PI = 4 * atan(1);

#define time clock() / (double) CLOCKS_PER_SEC

// #pragma GCC optimize("Ofast,no-stack-protector")
// #pragma GCC target("sse,sse2,sse3,sse3,sse4")
// #pragma GCC optimize("unroll-loops")
// #pragma GCC optimize("fast-math")
// #pragma GCC target("avx2")  
// #pragma GCC optimize("section-anchors")
// #pragma GCC optimize("profile-values,profile-reorder-functions,tracer")
// #pragma GCC optimize("vpt")
// #pragma GCC optimize("rename-registers")
// #pragma GCC optimize("move-loop-invariants")
// #pragma GCC optimize("unswitch-loops")
// #pragma GCC optimize("function-sections")
// #pragma GCC optimize("data-sections")

mt19937 gen(chrono::high_resolution_clock::now().time_since_epoch().count());

const int MAXN = 20;

int n, m;
int a[MAXN], b[MAXN];
vector<int> go[MAXN];
int mx[(1 << MAXN)], lft[(1 << MAXN)], suf[MAXN], ppc[(1 << MAXN)];

signed main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> m;
    int suma = 0, sumb = 0;
    for (int i = 0; i < n; i++) {
        cin >> a[i];
        suma += a[i];
    }
    for (int i = 0; i < m; i++) {
        cin >> b[i];
        sumb += b[i];
    }
    suf[n - 1] = a[n - 1];
    for (int i = n - 2; i >= 0; i--) {
        suf[i] = suf[i + 1] + a[i];
    }
    if (n > m || suma > sumb) {
        cout << "NO\n";
        return 0;
    }
    for (int i = 0; i < (1 << m); i++) {
        ppc[i] = __builtin_popcount(i);
        int sum = 0;
        for (int j = 0; j < m; j++) {
            if ((i >> j) & 1) {
                sum += b[j];
            }
        }
        for (int j = 0; j < n; j++) {
            if (sum == a[j]) {
                go[j].pb(i);
            }
        }
        lft[i] = sumb - sum;
    }
    for (int i = 0; i < (1 << m); i++) {
        if (mx[i] == n) {
            cout << "YES\n";
            return 0;
        }
        if (suf[mx[i]] > lft[i]) continue;
        for (auto mask : go[mx[i]]) {
            if (!(mask & i)) {
                chkmax(mx[i | mask], mx[i] + 1);
            }
        }
    }
    cout << "NO\n";
}
/*

*/

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