Submission #1093898

#	Time	Username	Problem	Language	Result	Execution time	Memory
1093898		InvMOD	Bank (IZhO14_bank)	C++14	100 / 100	76 ms	8640 KiB

bank

#include<bits/stdc++.h>

using namespace std;

template<typename T> bool ckmx(T& a, const T& b){if(a < b) return a = b, true; return false;}
template<typename T> bool ckmn(T& a, const T& b){if(a > b) return a = b, true; return false;}

const int N = 20;

int n, m, a[N], b[N];
int dp[(1<<N)], knapsack[(1<<N)];

void solve()
{
    cin >> n >> m;
    for(int i = 0; i < n; i++){
        cin >> a[i];
    }
    for(int i = 0; i < m; i++){
        cin >> b[i];
    }

    dp[0] = 1;
    for(int mask = 0; mask < (1<<m); mask++){
        if(!dp[mask]) continue;
        //can go through all permutation that form cur mask
        int cur_wanted = a[dp[mask]-1];
        for(int i = 0; i < m; i++){
            if(mask>>i&1) continue;

            int new_mask = mask | (1<<i);
            if(knapsack[mask] + b[i] == cur_wanted){
                if(ckmx(dp[new_mask], dp[mask]+1)){
                    knapsack[new_mask] = 0;
                }
            }
            else{
                if(ckmx(dp[new_mask], dp[mask])){
                    knapsack[new_mask] = knapsack[mask] + b[i];
                }
            }
        }
    }

    cout << (dp[(1<<m)-1] == n+1 ? "YES" : "NO") <<"\n";
}

int32_t main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    #define name "InvMOD"
    if(fopen(name".INP", "r")){
        freopen(name".INP", "r", stdin);
        freopen(name".OUT", "w", stdout);
    }

    solve();
    return 0;
}

Compilation message (stderr)

bank.cpp: In function 'int32_t main()':
bank.cpp:54:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   54 |         freopen(name".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:55:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   55 |         freopen(name".OUT", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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