Submission #836260

#TimeUsernameProblemLanguageResultExecution timeMemory
836260green_gold_dogFire (JOI20_ho_t5)C++17
7 / 100
150 ms67396 KiB
//#pragma GCC optimize("Ofast") //#pragma GCC target("avx,avx2,sse,sse2,sse3,ssse3,sse4,abm,popcnt,mmx") #include <bits/stdc++.h> using namespace std; typedef long long ll; typedef double db; typedef long double ldb; typedef complex<double> cd; constexpr ll INF64 = 9'000'000'000'000'000'000, INF32 = 2'000'000'000, MOD = 1'000'000'007; constexpr db PI = acos(-1); constexpr bool IS_FILE = false, IS_TEST_CASES = false; random_device rd; mt19937 rnd32(rd()); mt19937_64 rnd64(rd()); template<typename T> bool assign_max(T& a, T b) { if (b > a) { a = b; return true; } return false; } template<typename T> bool assign_min(T& a, T b) { if (b < a) { a = b; return true; } return false; } template<typename T> T square(T a) { return a * a; } template<> struct std::hash<pair<ll, ll>> { ll operator() (pair<ll, ll> p) const { return ((__int128)p.first * MOD + p.second) % INF64; } }; struct sparce_table { vector<vector<pair<ll, ll>>> arr; vector<ll> lg; sparce_table(vector<ll> a) { lg.push_back(0); while (lg.size() <= a.size()) { lg.push_back(lg.back()); if ((1 << (lg.back() + 1)) == lg.size() - 1) { lg.back()++; } } arr.resize(lg.back() + 1, vector<pair<ll, ll>>(a.size())); for (ll i = 0; i < a.size(); i++) { arr[0][i] = make_pair(a[i], i); } for (ll i = 1; i <= lg.back(); i++) { for (ll j = 0; j + (1 << (i - 1)) < a.size(); j++) { arr[i][j] = max(arr[i - 1][j], arr[i - 1][j + (1 << (i - 1))]); } } } pair<ll, ll> get(ll l, ll r) { return max(arr[lg[r - l]][l], arr[lg[r - l]][r - (1 << lg[r - l])]); } }; void solve() { ll n, q; cin >> n >> q; vector<ll> arr(n); for (ll i = 0; i < n; i++) { cin >> arr[i]; } sparce_table st(arr); for (ll i = 0; i < q; i++) { ll l, r, t; cin >> t >> l >> r; l--; cout << st.get(max(0ll, l - t), r).first << '\n'; } } int main() { if (IS_FILE) { freopen("", "r", stdin); freopen("", "w", stdout); } ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0); ll t = 1; if (IS_TEST_CASES) { cin >> t; } for (ll i = 0; i < t; i++) { solve(); } }

Compilation message (stderr)

ho_t5.cpp: In constructor 'sparce_table::sparce_table(std::vector<long long int>)':
ho_t5.cpp:57:52: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |                         if ((1 << (lg.back() + 1)) == lg.size() - 1) {
      |                             ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
ho_t5.cpp:62:34: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |                 for (ll i = 0; i < a.size(); i++) {
      |                                ~~^~~~~~~~~~
ho_t5.cpp:66:59: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |                         for (ll j = 0; j + (1 << (i - 1)) < a.size(); j++) {
      |                                        ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~
ho_t5.cpp: In function 'int main()':
ho_t5.cpp:94:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   94 |                 freopen("", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~
ho_t5.cpp:95:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   95 |                 freopen("", "w", stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~
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