Submission #1056110

#	Time	Username	Problem	Language	Result	Execution time	Memory
1056110		vjudge1	Bank (IZhO14_bank)	C++17	0 / 100	13 ms	8796 KiB

bank

#include<bits/stdc++.h>
#define ll long long
#define ii pair < int , int >
#define iii pair < int , ii>
#define iv pair < ii , ii >
#define fi first
#define se second
#define task "5TRIEU"
using namespace std;
const int N = 23;
const int mod = 1e9 + 7;
const int tt = 1e6;
const int base = 311;

int n, m;
int a[N], b[N], s[N];
bool dp[N][2 << N];

main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    if (fopen(task".inp", "r")){
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    cin >> n >> m;
    for(int i = 0; i < n; i++) cin >> a[i];
    for(int j = 0; j < m; j++) cin >> b[j];
    for(int mask = 0; mask < (1 << m); mask++)
    {
        int sum = 0;
        for(int j = 0; j < m; j++)
            if((mask >> j) & 1)
                sum += b[j];
        s[mask] = sum;
    }
    for(int mask = 0; mask < (1 << m); mask++)
        if(s[mask] == a[0])
            dp[0][mask] = 1;
    for(int i = 1; i < n; i++)
        for(int mask = 0; mask < (1 << m); mask++){
            for(int submask = mask; submask; submask = (submask - 1) & mask)
                //cout << mask << " " << (mask ^ submask) << endl;
                if(s[submask] == a[i])
                    dp[i][mask] |= dp[i - 1][mask ^ submask];
        }
    bool ans = 0;
    for(int mask = 0; mask < (1 << m); mask++)
        ans ^= dp[n - 1][mask];
    cout << ans;
}

Compilation message (stderr)

bank.cpp:19:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   19 | main()
      | ^~~~
bank.cpp: In function 'int main()':
bank.cpp:25:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:26:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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