Submission #1088201

#	Time	Username	Problem	Language	Result	Execution time	Memory
1088201		T0p_	Bank (IZhO14_bank)	C++14	71 / 100	178 ms	182096 KiB

bank

#include <bits/stdc++.h>
using namespace std;

const int N = 20;

int a[N], b[N], dp[N][1<<N];
vector<int> sum_to_bit[20001];

int solve(int n, int s) {
  if (dp[n][s] != -1) {
    return dp[n][s];
  }

  if (n == 0) {
    return dp[n][s] = 1;
  }

  int res = 0;
  for (int bit : sum_to_bit[a[n-1]]) {
    if ((bit & s) == bit) {
      res |= solve(n-1, bit ^ s);
    }
  }

  return dp[n][s] = res;
}

int main() {
  int n, m;
  scanf(" %d %d", &n, &m);

  for (int i=0 ; i<n ; i++) {
    scanf(" %d", &a[i]);
  }

  for (int i=0 ; i<m ; i++) {
    scanf(" %d", &b[i]);
  }

  for (int i=0 ; i<1<<m ; i++) {
    int sum = 0;
    for (int j=0 ; j<m ; j++) {
      if (i & (1<<j)) {
        sum += b[j];
      }
    }

    sum_to_bit[sum].push_back(i);
  }

  memset(dp, -1, sizeof(dp));

  printf(solve(n, (1<<m)-1) == 1 ? "YES\n" : "NO\n");
  return 0;
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:30:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |   scanf(" %d %d", &n, &m);
      |   ~~~~~^~~~~~~~~~~~~~~~~~
bank.cpp:33:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |     scanf(" %d", &a[i]);
      |     ~~~~~^~~~~~~~~~~~~~
bank.cpp:37:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |     scanf(" %d", &b[i]);
      |     ~~~~~^~~~~~~~~~~~~~

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