Submission #855887

#	Time	Username	Problem	Language	Result	Execution time	Memory
855887		bestrazhuxp	Bank (IZhO14_bank)	C++17	100 / 100	109 ms	8652 KiB

bank

#include <bits/stdc++.h>
#define ll long long
#define se second
#define fi first
#define pb push_back
#define all(x) (x).begin() , (x).end()
#define sz(x) (int)(x).size()
#define BIT(x , i) ((x) >> (i) & 1)
#define MASK(i) (1LL << (i))
#define name "1"
#define task ""

using namespace std;

const int inf = 1e9 + 7;
const ll linf = 1ll * inf * inf;
const int mod = 1e9 + 7;
const int maxn = 1e5 + 2;

void file(){if(fopen(task".inp" , "r")){freopen(task".inp" , "r" , stdin);freopen(task".out" , "w" , stdout);}else if(fopen(name".inp" , "r")){freopen(name".inp" , "r" , stdin);freopen(name".out" , "w" , stdout);}}
int n;
int m;
int a[20];
int b[20];
int f[1 << 20];
int rem[1 << 20];
bool maximize(int &x , int y)
{
    if(x < y) return x = y, 1;
    return 0;
}
int main()
{
    file();
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n >> m;
    for(int i = 0 ; i < n; i++) cin >> a[i];
    for(int i = 0 ; i < m; i++) cin >> b[i];
    memset(f , -1, sizeof f);
    f[0] = 0;
    for(int s = 0 ; s < MASK(m) ; s++)
    {
        for(int i = 0; i < m; i++)
        {
            if(!BIT(s , i)) continue;
            int prev = s ^ MASK(i);
            if(f[prev] < 0) continue;
            int cur = a[f[prev]];
            if(rem[prev] + b[i] < cur)
            {
                f[s] = f[prev];
                rem[s] = rem[prev] + b[i];
            }
            else if(rem[prev] + b[i] == cur)
            {
                f[s] = f[prev] + 1;
                rem[s] = 0;
            }
            if(f[s] == n) return cout << "YES" , 0;
        }
    }
    cout << "NO";
}

Compilation message (stderr)

bank.cpp: In function 'void file()':
bank.cpp:20:48: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 | void file(){if(fopen(task".inp" , "r")){freopen(task".inp" , "r" , stdin);freopen(task".out" , "w" , stdout);}else if(fopen(name".inp" , "r")){freopen(name".inp" , "r" , stdin);freopen(name".out" , "w" , stdout);}}
      |                                         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:20:82: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 | void file(){if(fopen(task".inp" , "r")){freopen(task".inp" , "r" , stdin);freopen(task".out" , "w" , stdout);}else if(fopen(name".inp" , "r")){freopen(name".inp" , "r" , stdin);freopen(name".out" , "w" , stdout);}}
      |                                                                           ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:20:151: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 | void file(){if(fopen(task".inp" , "r")){freopen(task".inp" , "r" , stdin);freopen(task".out" , "w" , stdout);}else if(fopen(name".inp" , "r")){freopen(name".inp" , "r" , stdin);freopen(name".out" , "w" , stdout);}}
      |                                                                                                                                                ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:20:185: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 | void file(){if(fopen(task".inp" , "r")){freopen(task".inp" , "r" , stdin);freopen(task".out" , "w" , stdout);}else if(fopen(name".inp" , "r")){freopen(name".inp" , "r" , stdin);freopen(name".out" , "w" , stdout);}}
      |                                                                                                                                                                                  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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