Submission #930411

#	Time	Username	Problem	Language	Result	Execution time	Memory
930411		uped	Bank (IZhO14_bank)	C++14	100 / 100	95 ms	8652 KiB

bank

#include <bits/stdc++.h>

#define DEBUG(x) cout << #x << ": " << x << '\n';

using namespace std;
using ll = long long;

int main() {
    int n, m;
    cin >> n >> m;
    vector<int> a(n);
    for (int i = 0; i < n; ++i) {
        cin >> a[i];
    }
    vector<int> b(m);
    for (int i = 0; i < m; ++i) {
        cin >> b[i];
    }
    // dp of subset X -> num of people in prefix, leftover sum.
    // left-over must equal be for num of people and set
    // so we must maximize prefix
    vector<pair<int, int>> dp(1 << m, {-1, -1});
    dp[0] = {0, 0};
    bool ok = false;
    for (int i = 1; i < (1 << m); ++i) {
        for (int j = 0; j < m; ++j) {
            if (!(i & (1 << j))) continue; // j not in i
            auto& [cnt, leftover] = dp[i ^ (1 << j)];
            if (cnt == -1) continue; // impossible state
            int target = a[cnt]; // current salary we try to fill
            // only one can be always satisfied!
            if (leftover + b[j] < target) {
                dp[i] = {cnt, leftover + b[j]};
            } else if (leftover + b[j] == target) {
                dp[i] = {cnt + 1, 0};
            }
        }
        if (dp[i].first == n) {
            ok = true;
            break;
        }   
    }
    cout << (ok ? "YES" : "NO");
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:28:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   28 |             auto& [cnt, leftover] = dp[i ^ (1 << j)];
      |                   ^

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