Submission #885969

#	Time	Username	Problem	Language	Result	Execution time	Memory
885969		Zero_OP	Bank (IZhO14_bank)	C++14	100 / 100	103 ms	8648 KiB

bank

#include<bits/stdc++.h>

using namespace std;

#define range(v) begin(v), end(v)
#define compact(v) v.erase(unique(range(v)), end(v))

template<class T> bool minimize(T& a, T b){
    if(a > b) return a = b, true;
    return false;
}

template<class T> bool maximize(T& a, T b){
    if(a < b) return a = b, true;
    return false;
}

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;

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

    vector<pair<int, int>> dp(1 << m, make_pair(-1, -1));
    dp[0] = {0, 0};

    for(int mask = 0; mask < (1 << m); ++mask){
        if(dp[mask].first == -1) continue;
        if(dp[mask].first == n){
            cout << "YES\n";
            return;
        }
       // cout << mask << " : " << dp[mask].first << ' ' << dp[mask].second << '\n';
        for(int i = 0; i < m; ++i){
            if(mask >> i & 1 ^ 1){
                int newMask = mask ^ (1 << i);
                if(dp[mask].second + b[i] == a[dp[mask].first]){
                    maximize(dp[newMask], make_pair(dp[mask].first + 1, 0));
                }
                else{
                    maximize(dp[newMask], make_pair(dp[mask].first, dp[mask].second + b[i]));
                }
            }
        }
    }

    cout << "NO\n";
}

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

    if(fopen("antuvu.inp", "r")){
        freopen("antuvu.inp", "r", stdin);
        freopen("antuvu.out", "w", stdout);
    }

    Zero_OP();

    return 0;
}

Compilation message (stderr)

bank.cpp: In function 'void Zero_OP()':
bank.cpp:44:26: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   44 |             if(mask >> i & 1 ^ 1){
      |                ~~~~~~~~~~^~~
bank.cpp: In function 'int main()':
bank.cpp:64:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |         freopen("antuvu.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:65:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   65 |         freopen("antuvu.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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