Submission #809841

#	Time	Username	Problem	Language	Result	Execution time	Memory
809841		fanwen	Bank (IZhO14_bank)	C++17	100 / 100	104 ms	8516 KiB

bank

#include <bits/stdc++.h>

using namespace std;

#define MASK(x) (1LL << (x))
#define BIT(x, i) (((x) >> (i)) & 1)
#define ALL(x) (x).begin(), (x).end()
#define REP(i, n) for (int i = 0, _n = n; i < _n; ++i)
#define FOR(i, a, b) for (int i = (a), _b = (b); i <= _b; ++i)
#define FORD(i, a, b) for (int i = (a), _b = (b); i >= _b; --i)
#define FORE(i, a, b) for (int i = (a), _b = (b); i < _b; ++i)
#define debug(...) "[" << #__VA_ARGS__ ": " << (__VA_ARGS__) << "] "
#define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }

template <class A, class B> bool minimize(A &a, B b)  { if (a > b) { a = b; return true; } return false; }
template <class A, class B> bool maximize(A &a, B b)  { if (a < b) { a = b; return true; } return false; }

int N, M, a[20], b[20], rem[MASK(20)], dp[MASK(20)];

void you_make_it(void) {
    cin >> N >> M;
    REP(i, N) cin >> a[i];
    REP(i, M) cin >> b[i];
    memset(dp, -1, sizeof dp);
    dp[0] = 0;
    REP(mask, MASK(M)) REP(i, M) if(BIT(mask, i)) {
        if(dp[mask ^ MASK(i)] == -1) continue;
        int cur = a[dp[mask ^ MASK(i)]], r = rem[mask ^ MASK(i)];
        if(r + b[i] < cur) {
            dp[mask] = dp[mask ^ MASK(i)];
            rem[mask] = r + b[i];
        } else if(r + b[i] == cur) {
            dp[mask] = dp[mask ^ MASK(i)] + 1;
            rem[mask] = 0;
        }
        if(dp[mask] == N) return void(cout << "YES");
    }
    cout << "NO";
}

signed main() {

#ifdef LOCAL
    freopen("TASK.inp", "r", stdin);
    freopen("TASK.out", "w", stdout);
#endif
  	file("bank");
    auto start_time = chrono::steady_clock::now();

    cin.tie(0), cout.tie(0) -> sync_with_stdio(0);

    you_make_it();

    auto end_time = chrono::steady_clock::now();

    cerr << "\nExecution time : " << chrono::duration_cast <chrono::milliseconds> (end_time - start_time).count() << "[ms]" << endl;

    return (0 ^ 0);
}

// Dream it. Wish it. Do it.

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:13:57: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 | #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:47:4: note: in expansion of macro 'file'
   47 |    file("bank");
      |    ^~~~
bank.cpp:13:90: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 | #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                                                   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:47:4: note: in expansion of macro 'file'
   47 |    file("bank");
      |    ^~~~

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