Submission #1121545

#TimeUsernameProblemLanguageResultExecution timeMemory
1121545vjudge1Ice Hockey World Championship (CEOI15_bobek)C++17
100 / 100
399 ms8728 KiB
/* #ifndef ONLINE_JUDGE #include "AkbarKING.h" // aska geldi akbarking.h #else #define debug(...) #define debugArr(...) #define debugG(...) #endif */ #include <bits/stdc++.h> #include <ext/pb_ds/assoc_container.hpp> #include <ext/pb_ds/hash_policy.hpp> #define int long long #define $AzH_TxdmN$ ios_base::sync_with_stdio(0);cin.tie(nullptr);cout.tie(nullptr); #pragma GCC target("sse,sse2,sse3,ssse3,popcnt,abm,mmx,tune=native") #pragma GCC optimize("Ofast") #pragma GCC optimize("no-stack-protector") #pragma GCC optimize("unroll-loops") #pragma GCC optimize("fast-math") #define ep emplace_back #define pb push_back #define pii pair<int,int> #define all(v) v.begin(),v.end() #define rall(v) v.rbegin(),v.rend() using namespace std; using namespace __gnu_pbds; template <typename T> using __indexed_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>; template <typename T> using __indexed_multiset = tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>; const int sz = 3e5+9; const int LOG = 63; const int MOD = 1e9+7; const int INF = 1e18; int a[LOG]; int n,m; vector<int>rHalf; void solve() { cin>>n>>m; for (int i = 1; i <= n ; ++i) { cin>>a[i]; } if (n == 1) { cout<<1+(a[1] <= m)<<'\n'; return; } for (int mask = 0; mask < (1LL<<(n - n/2)); ++mask) { int sm = 0; for (int i = 0; i < (n - n/2); ++i) { if (mask & (1LL<<i)) { sm += a[n/2+1+i]; } } rHalf.ep(sm); } sort(all(rHalf)); int res = 0; for (int mask = 0; mask < (1LL<<(n/2)); ++mask) { int sm = 0; for (int i = 0; i < n/2; ++i) { if (mask & (1LL<<i)) { sm += a[i+1]; } } res += upper_bound(all(rHalf),m-sm)-rHalf.begin();; } cout<<res<<'\n'; } signed main() { $AzH_TxdmN$ int t = 1; //cin>>t; while (t--) { solve(); } }
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