Submission #927411

#	Time	Username	Problem	Language	Result	Execution time	Memory
927411		May27_th	Bank (IZhO14_bank)	C++17	0 / 100	1 ms	348 KiB

bank

#include<bits/stdc++.h>
#define taskname "bank"
using namespace std;

void World_Final();
void Solve();

int main(){
    ios_base::sync_with_stdio(false); cin.tie(nullptr);
    if (fopen(taskname".inp", "r")) {
        freopen(taskname".inp", "r", stdin);
        freopen(taskname".out", "w", stdout);
    }
    World_Final();
}

void World_Final(){
    int Tests = 1;
    //cin >> Tests;
    while (Tests --) {
        Solve();
    }
}

void Solve(){
    int N, M; cin >> N >> M;
    vector<int> a(N), b(M), pref(M + 5, 0), cover((1 << M) + 5, -1);
    for (int &x : a) cin >> x;
    for (int &x : b) cin >> x;
    for (int i = 1; i <= M; i ++) {
        pref[i] = pref[i - 1] + b[i - 1];
    }
    cover[0] = 0;
    for (int mask = 0; mask < (1 << M); mask ++) {
        int tot = 0;
        for (int i = 0; i < M; i ++) {
            if (mask >> i & 1) tot = tot + b[i];
        }
        int pos = cover[mask];
        if (pos == -1) continue;
        if (pos == N - 1) {
            cout << "YES" << "\n";
            return;
        }
        if (tot - pref[pos] == b[pos]) {
            cover[mask] ++;
        }
    }
    cout << "NO" << "\n";

}
/**


**/

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:11:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |         freopen(taskname".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:12:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |         freopen(taskname".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 19
• Subtask 2: 0 / 25
• Subtask 3: 0 / 27
• Subtask 4: 0 / 29