Submission #1002983

#TimeUsernameProblemLanguageResultExecution timeMemory
1002983whatthemomooofun1729Ice Hockey World Championship (CEOI15_bobek)C++17
70 / 100
1074 ms148096 KiB
#include <iostream> #include <algorithm> #include <utility> #include <vector> #include <stack> #include <map> #include <queue> #include <set> #include <unordered_set> #include <unordered_map> #include <cstring> #include <cmath> #include <functional> #include <cassert> #include <iomanip> #include <numeric> #include <bitset> #include <sstream> #include <chrono> #include <random> #define ff first #define ss second #define PB push_back #define sz(x) int(x.size()) #define rsz resize #define fch(xxx, yyy) for (auto xxx : yyy) // abusive notation #define all(x) (x).begin(),(x).end() #define eps 1e-9 // more abusive notation (use at your own risk): // #define int ll using namespace std; typedef long long ll; typedef long double ld; typedef unsigned long long ull; using pii = pair<int, int>; using pll = pair<ll, ll>; using vi = vector<int>; using vll = vector<ll>; // debugging void __print(int x) {std::cerr << x;} void __print(ll x) {std::cerr << x;} /* remember to uncomment this when not using THE MACRO */ void __print(unsigned x) {std::cerr << x;} void __print(ull x) {std::cerr << x;} void __print(float x) {std::cerr << x;} void __print(double x) {std::cerr << x;} void __print(ld x) {std::cerr << x;} void __print(char x) {std::cerr << '\'' << x << '\'';} void __print(const char *x) {std::cerr << '\"' << x << '\"';} void __print(const string& x) {std::cerr << '\"' << x << '\"';} void __print(bool x) {cerr << (x ? "true" : "false");} template<typename T, typename V> void __print(const pair<T, V> &x) {std::cerr << '{'; __print(x.ff); std::cerr << ", "; __print(x.ss); std::cerr << '}';} template<typename T> void __print(const T& x) {int f = 0; std::cerr << '{'; for (auto &i: x) std::cerr << (f++ ? ", " : ""), __print(i); std::cerr << "}";} void _print() {std::cerr << "]\n";} template <typename T, typename... V> void _print(T t, V... v) {__print(t); if (sizeof...(v)) std::cerr << ", "; _print(v...);} void println() {std::cerr << ">--------------------<" << endl;} #ifndef ONLINE_JUDGE #define debug(x...) cerr << "[" << #x << "] = ["; _print(x) #else #define debug(x...) #endif // templates template <class T> bool ckmin(T &a, const T &b) {return b<a ? a = b, 1 : 0;} template <class T> bool ckmax(T &a, const T &b) {return b>a ? a = b, 1 : 0;} template <class T> using gr = greater<T>; template <class T> using vc = vector<T>; template <class T> using p_q = priority_queue<T>; template <class T> using pqg = priority_queue<T, vc<T>, gr<T>>; template <class T1, class T2> using pr = pair<T1, T2>; mt19937_64 rng_ll(chrono::steady_clock::now().time_since_epoch().count()); int rng(int M) {return (int)(rng_ll()%M);} /*returns any random number in [0, M) */ // const variables constexpr int INF = (int)2e9; constexpr int MOD = 998244353; constexpr ll LL_INF = (ll)3e18; constexpr int mod = (int)1e9 + 7; constexpr ll inverse = 500000004LL; // inverse of 2 modulo 1e9 + 7 void setIO(const string& str) {// fast input/output ios_base::sync_with_stdio(false); cin.tie(nullptr); if (str.empty()) return; freopen((str + ".in").c_str(), "r", stdin); freopen((str + ".out").c_str(), "w", stdout); } int N, A, B; ll M; vll a, b; ll dp[2][(1 << 20)]; map<ll, int> suma, sumb; signed main() { // TIME YOURSELF !!! setIO(""); cin >> N >> M; a.rsz(N/2), b.rsz((N+1)/2); for (int i = 0; i < sz(a); ++i) { cin >> a[i]; } for (int i = 0; i < sz(b); ++i) { cin >> b[i]; } A = sz(a), B = sz(b); ll ans = 0; for (int mask = 0; mask < (1 << A); ++mask) { if (mask > 0) suma[dp[0][mask]]++; if (dp[0][mask] <= M) ans++; for (int i = 0; i < A; ++i) { if (!(mask & (1 << i))) { int mask_ = mask ^ (1 << i); dp[0][mask_] = dp[0][mask] + a[i]; } } } for (int mask = 0; mask < (1 << B); ++mask) { if (mask > 0) sumb[dp[1][mask]]++; if (dp[1][mask] <= M) ans++; for (int i = 0; i < B; ++i) { if (!(mask & (1 << i))) { int mask_ = mask ^ (1 << i); dp[1][mask_] = dp[1][mask] + b[i]; } } } for (auto i = sumb.begin(), j = next(i); j != sumb.end(); i++, j++) { j->ss += i->ss; } for (auto i = suma.begin(); i != suma.end(); i++) { ll leftover = M - i->ff; if (leftover > 0) { auto it = sumb.upper_bound(leftover); if (it != sumb.begin()) { it--; int cnt1 = i->ss, cnt2 = it->ss; // should be the sum of cnt for all <= leftover ans += (ll) cnt1 * cnt2; } } } cout << ans - 1; return 0; } // TLE -> TRY NOT USING DEFINE INT LONG LONG // CE -> CHECK LINE 45 // 5000 * 5000 size matrices are kinda big (potential mle) // Do something, start simpler

Compilation message (stderr)

bobek.cpp: In function 'void setIO(const string&)':
bobek.cpp:88:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   88 |     freopen((str + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bobek.cpp:89:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   89 |     freopen((str + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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