Submission #598419

#	Time	Username	Problem	Language	Result	Execution time	Memory
598419		Belgutei	Bank (IZhO14_bank)	C++17	0 / 100	3 ms	340 KiB

bank

#include <bits/stdc++.h>

using namespace std;

typedef pair<long long, long long> Point;

#define ll long long
#define ff first
#define ss second
#define pb push_back
#define mk make_pair
#define IOS ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); 
#define MOD 1000000007
#define MOD1 1000000009
#define sqr(x) sqr((x)*(x))

void debug_out() { cerr << endl; }
template<typename Head, typename... Tail> void debug_out(Head H, Tail... T) { cerr << ' ' << H; debug_out(T...); }
#ifdef BE_DEBUG
#define debug(...) cerr << "\033[1;31m(" << #__VA_ARGS__ << "):\033[0m", debug_out(__VA_ARGS__)
#else
#define debug(...)
#endif

const int N = 1100005;
int n,m;
int a[30], b[30];
vector<int> v[1005];
bool check[N], tmp[N], ans;

int go(int val) {
    int ret = 0;
    int cnt = 0;
    while(val > 0) {
        if(val % 2 == 1) ret += b[cnt];
        val /= 2;
        cnt ++;
    }
    return ret;
}

int main() {
    IOS
    freopen("bank.in", "r", stdin);
    freopen("bank.out", "w", stdout);
    cin >> n >> m;
    for(int i = 0; i < n; i ++) cin >> a[i];
    for(int i = 0; i < m; i ++) cin >> b[i];
    for(int i = 0; i < (1 << m); i ++) {
        int val = go(i);
        if(val <= 1000) {
            v[val].pb(i);
        }
    }
    check[0] = 1;
    for(int i = 0; i < n; i ++) {
        for(int j = 0; j < (1 << m); j ++) {
            tmp[j] = check[j];
            check[j] = 0;
        }
        for(int j = 0; j < (1 << m); j ++) {
            if(tmp[j] == 0) continue;
            for(auto x: v[a[i]]) {
                if((x & j) == 0) {
                    check[x | j] = 1;
                    if(i == n - 1) ans = 1;
                }
            }
        }
        //
    }
    if(ans == 1) {
        cout << "YES";
    }
    else cout << "NO";
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:44:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |     freopen("bank.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:45:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |     freopen("bank.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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