제출 #998423

#제출 시각아이디문제언어결과실행 시간메모리
998423whatthemomooofun1729선물상자 (IOI15_boxes)C++17
0 / 100
1 ms444 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); } vll t1, t2; void update(vll& t, int u, int tl, int tr, int pos, ll val) { if (tl == tr && tl == pos) { ckmin(t[u], val); return; } int mid = (tl + tr)/2; if (pos <= mid) update(t, 2 * u, tl, mid, pos, val); else update(t, 2 * u + 1, mid+1, tr, pos, val); t[u] = min(t[2 * u], t[2 * u + 1]); } ll query(vll& t, int u, int tl, int tr, int l, int r) { if (l > r) return INF; if (tl == l && tr == r) return t[u]; int mid = (tl + tr)/2; ll left = query(t, 2 * u, tl, mid, l, min(mid, r)); ll right = query(t, 2 * u + 1, mid+1, tr, max(mid+1, l), r); return min(left, right); } ll delivery(int n, int k, int l, int* positions) { vi p; for (int i = 0; i < n; ++i) { p.PB(positions[i]); } sort(all(p)); vc<pii> teams{{0, 0}}; for (int i = 0; i < n; ++i) { if (teams.back().ff == positions[i]) { teams.back().ss++; } else { teams.PB({positions[i], 1}); } } int M = sz(teams); vll psum(M, 0), dp(M, INF); t1.rsz(4 * M, INF), t2.rsz(4 * M, INF); for (int i = 0; i < M; ++i) { psum[i] = (i > 0 ? psum[i-1] : 0) + teams[i].ss; } //debug(teams); int middle = int(lower_bound(all(teams), pii{l/2, INF}) - teams.begin()); middle--; // [0, middle] U [middle+1, L-1] //debug(middle); dp[0] = 0; // position 0 means nothing auto check = [&](const int& j, const int& i) { ll sum = psum[i] - psum[j]; return sum <= k; }; update(t1, 1, 0, M-1, 0, 0); update(t2, 1, 0, M-1, 0, 2 * (l - 1)); for (int i = 1; i < M; ++i) { //debug(i); int lj = 0, rj = i - 1; while (lj <= rj) { int mj = (lj + rj)/2; if (check(mj, i)) { rj = mj - 1; } else { lj = mj + 1; } } rj++; //debug(rj); if (i > middle) { ckmin(dp[i], query(t1, 1, 0, M - 1, rj, middle - 1) + l); ckmin(dp[i], query(t2, 1, 0, M-1, max(rj, middle), i - 1)); } else { ckmin(dp[i], query(t1, 1, 0, M-1, rj, i - 1) + 2 * teams[i].ff); } //debug(dp[i]); update(t1, 1, 0, M-1, i, dp[i]); if (i < M - 1) update(t2, 1, 0, M - 1, i, dp[i] + 2 * (l - teams[i+1].ff)); } return dp[M-1]; } /* int N, K, L; int positions[10000]; signed main() { // TIME YOURSELF !!! setIO(""); cin >> N >> K >> L; for (int i = 0; i < N; ++i) { cin >> positions[i]; } cout << delivery(N, K, L, positions); }*/ // 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

컴파일 시 표준 에러 (stderr) 메시지

boxes.cpp: In function 'void setIO(const string&)':
boxes.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);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
boxes.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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