Submission #1107305

#	Time	Username	Problem	Language	Result	Execution time	Memory
1107305		vjudge1	Bank (IZhO14_bank)	C++17	46 / 100	453 ms	262144 KiB

bank

#include <bits/stdc++.h>
#define yes cout<<"YES\n"
#define no cout<<"NO\n"
#define ff first
#define int long long
#define ss second
#define pb push_back
#define y1 zildjian

using namespace std;

const int N = 2e6+100;
const int INF = 1e18;
const int mod = 1e9+7;
const int dx[] = {-1,-1,0,1,1,1,0,-1,0};
const int dy[] = {0,1,1,1,0,-1,-1,-1,0};
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

int binpow (int a, int n){
	if (n == 0)
		return 1;
	if (n % 2 == 1)
		return (binpow (a, n-1)%mod * a%mod)%mod;
	else {
		int b = binpow (a, n/2) % mod;
		return (b%mod * b%mod)%mod;
	}
}

int n,m;
int a[N],b[N];
vector<int> ms[N];
vector<int> path[N];

bool go(int mask, int cur){
    if(mask&cur) return 0;
    if(path[mask].empty()) return 1;
    bool check = 0;
    for(auto x:path[mask]){
        check |= go(x,mask);
    }
    return check;
}

void solve(){
    cin>>n>>m;
    for(int i = 1;i<=n;i++){
        cin>>a[i];
    }
    for(int i = 1;i<=m;i++){
        cin>>b[i];
    }
    int cnt = 0;
    ms[0].pb(0);
    for(int i = 1;i<=n;i++){
        bool f = 0;
        for(int mask = 0;mask<(1<<m);mask++){
            int sum = 0;
            for(int j = 1;j<=m;j++){
                if(1&(mask>>(j-1))) sum+=b[j];
            }
            if(sum == a[i]){
                bool ok = 0;
                vector<int> mem;
                for(auto prevmask:ms[i-1]){
                    if(go(prevmask,mask)){
                        ok = 1;
                        mem.pb(prevmask);
                    }
                }
                if(ok){
                    f = 1;
                    ms[i].pb(mask);
                    for(auto x:mem) path[mask].pb(x);
                }
            }
        }
        if(!f){
            no;
            return;
        }
    }
    yes;
}   

signed main(){
    // freopen("floyd.in","r",stdin); 
    // freopen("floyd.out","w",stdout);
    ios_base::sync_with_stdio(0);
    cin.tie(nullptr);
    // cout.tie(nullptr);
    int T = 1;
    // cin>>T;
    for(int i = 1;i<=T;i++){
        // cout<<"Case "<<i<<": ";
        solve();
    }
}

Compilation message (stderr)

bank.cpp: In function 'void solve()':
bank.cpp:53:9: warning: unused variable 'cnt' [-Wunused-variable]
   53 |     int cnt = 0;
      |         ^~~

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