/* cf : F112 /) /) ~ ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┃ ( •-• ) ~ ♡ You are amazing ♡ / づづ ~ ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛ */ #include <bits/stdc++.h> using namespace std; #define F first #define S second #define int long long #define Ali ios::sync_with_stdio(false), cin.tie(0), cout.tie(0) const int N = 3e2 + 7; const int P = 233; const int len = 250; const int MOD = 1e9 + 7; const int inf = 1e18; int gcd(int x, int y){ while(y){ x %= y; swap(x, y); } return x; } int binpow(int n, int k){ if (k == 0) return 1; if (k % 2 == 0){ int val = binpow(n, k / 2); return (val * val) % MOD; } return (n * binpow(n, k - 1)) % MOD; } vector < vector < int > > dp(N, vector < int > (N * N)); void abb(){ int n, m, k; cin >> n >> m >> k; vector < int > a(n + 1); vector < int > b(m + 1); bool ok = true; int suma = 0, sumb = 0; for (int i = 1; i <= n; ++i) cin >> a[i], ok &= (a[i] >= k), suma += a[i]; for (int i = 1; i <= m; ++i) { cin >> b[i]; sumb += b[i]; } if (ok == false){ cout << "Impossible\n"; return; } for (int sum = 1; sum <= sumb; ++sum){ for (int i = 1; i <= m; ++i){ dp[i][sum] = dp[i - 1][sum]; if (sum - b[i] >= 0) dp[i][sum] = max(dp[i][sum], dp[i - 1][sum - b[i]] + min(b[i], n)); } } for (int sum = 1; sum <= sumb; ++sum){ // cout << dp[m][sum] << " "; if (dp[m][sum] >= k * n){ cout << sum - suma << "\n"; return; } } // cout << "\n"; cout << "Impossible"; } /* 4 4 3 4 4 4 4 10 5 4 3 */ signed main(){ Ali; int T = 1; // cin >> T; while(T--){ abb(); } }