Submission #125781

#	Time	Username	Problem	Language	Result	Execution time	Memory
125781		srvlt	Bank (IZhO14_bank)	C++14	71 / 100	1074 ms	4748 KiB

bank

#include <bits/stdc++.h>
#define ll long long
#define db long double
#define pb push_back
#define ppb pop_back
#define fi first
#define se second
#define mp make_pair
#define endl "\n"
using namespace std;

int n, m, a[20], b[20], s[(1 << 20)];
bitset <(1 << 20)> dp[20];
vector <int> d[20];
char used[1001];

void solve1() {
    cin>>m;
    for (int i = 0; i < n; i++) {
        cin>>a[i];
    }
    for (int i = 0; i < m; i++) {
        cin>>b[i];
    }
    used[0] = true;
    for (int j = 0; j < m; j++) {
        for (int i = a[0]; i >= b[j]; i--) {
            if (used[i - b[j]]) {
                used[i] = true;
            }
        }
    }
    if (used[a[0]]) {
        cout<<"YES";
    }   else {
        cout<<"NO";
    }
}

void solve2() {
    cin>>m;
    for (int i = 0; i < n; i++) {
        cin>>a[i];
    }
    for (int i = 0; i < m; i++) {
        cin>>b[i];
    }
    for (int i = 0; i < (1 << m); i++) {
        for (int j = 0; j < m; j++) {
            if (i & (1 << j)) {
                s[i] += b[j];
            }
        }
        for (int j = 0; j < n; j++) {
            if (s[i] == a[j]) {
                d[j].pb(i);
            }
        }
    }
    for (int i = 0; i < n; i++) {
        dp[i][0] = true;
    }
    int tmp = (1 << m);
    for (int i = 0; i < n; i++) {
        for (int j = 1; j < tmp; j++) {
            for (int k = 0; k < d[i].size(); k++) {
                if ((j & d[i][k]) == d[i][k]) {
                    if (i > 0) {
                        if (dp[i - 1][j ^ d[i][k]]) {
                            dp[i][j] = true;
                            break;
                        }
                    }   else {
                        dp[i][j] = true;
                        break;
                    }
                }
            }
        }
    }
    if (dp[n - 1][tmp - 1]) {
        cout<<"YES";
    }   else {
        cout<<"NO";
    }
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin>>n;
    if (n == 1) {
        solve1();
    }   else {
        solve2();
    }
}

Compilation message (stderr)

bank.cpp: In function 'void solve2()':
bank.cpp:66:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for (int k = 0; k < d[i].size(); k++) {
                             ~~^~~~~~~~~~~~~

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