Submission #1182073

#TimeUsernameProblemLanguageResultExecution timeMemory
1182073swishy123Knapsack (NOI18_knapsack)C++20
100 / 100
86 ms4564 KiB
#include <iostream> #include <algorithm> #include <vector> #include <random> #include <chrono> #include <set> #include <map> #include <stack> #include <functional> #include <iomanip> #include <queue> #include <cassert> #include <complex> #include <cstring> #include <memory> #include <bitset> #include <sstream> #include <cmath> #include <numeric> #include <numbers> #include <fstream> using namespace std; #ifndef template #ifndef define #define ll long long #define ld long double #define pl pair<ll, ll> #define pi pair<int, int> #define nl cout << '\n'; #define x first #define y second #define cbit(x) __builtin_popcountll(x) #define uid(a, b) uniform_int_distribution<ll>(a, b)(rng) #define siz(x) (int)x.size() #endif #ifndef print void print(size_t x) {cout << x << ' ';} void print(int x) {cout << x << ' ';} void print(long long x) {cout << x << ' ';} void print(float x) {cout << x << ' ';} void print(long double x) {cout << x << ' ';} void print(char x) {cout << x << ' ';} void print(const char* x) {cout << x << ' ';} void print(bool x) {cout << x << ' ';} void print(string &x) {cout << x << ' ';} template<typename T, typename V> void print(pair<T, V> &p) {print(p.x); print(p.y);} template<typename T> void print(vector<T> v) {for (int i = 0; i < v.size(); i++) print(v[i]);} template<typename T> void print(vector<vector<T>> v) { for (int i = 0; i < v.size(); i++){ for (int j = 0; j < v[i].size(); j++) print(v[i][j]); nl; } } template <typename T, typename... V> void print(T t, V&&... v) {print(t); print(v...);} #endif #ifndef read void read(int &x) {cin >> x;} void read(long long &x) {cin >> x;} void read(unsigned &x) {cin >> x;} void read(unsigned long long &x) {cin >> x;} void read(float &x) {cin >> x;} void read(long double &x) {cin >> x;} void read(char &x) {cin >> x;} void read(string &x) {cin >> x;} void read(bool &x) {cin >> x;} template<typename T> void read(vector<T> &v) { for (int i = 0; i < v.size(); i++) read(v[i]); } template <typename T, typename... V> void read(T &t, V&... v) {read(t); read(v...);} #endif mt19937 rng(chrono::steady_clock::now().time_since_epoch().count()); template<class T> bool maxi(T& a, const T& b) { return a < b ? a = b, 1 : 0; } template<class T> bool mini(T& a, const T& b) { return a > b ? a = b, 1 : 0; } template<class... Args> auto vec(size_t n, Args&&... args) { if constexpr(sizeof...(args) == 1) return vector(n, args...); else return vector(n, vec(args...)); } #endif using namespace std; const ll inf = 1e15; const ll def = 2e5+1; const ll mod = 998244353; ll dp[def]; void solve(){ int s, n; read(s, n); vector<vector<int>> good(s + 1); for (int i = 0; i < n; i++){ ll v, w, k; read(v, w, k); ll cnt = 1; while (cnt <= k){ if (cnt * w <= s) good[cnt * w].push_back(cnt * v); k -= cnt; cnt *= 2; } if (k){ if (k * w <= s) good[k * w].push_back(k * v); } } ll res = 0; for (int i = 1; i <= s; i++){ sort(good[i].begin(), good[i].end(), greater<int>()); ll crr = 0; for (int j = 0; j < good[i].size(); j++){ crr += i; if (crr > s) break; for (int u = s; u >= i; u--) maxi(dp[u], dp[u - i] + good[i][j]); } } for (int i = 0; i < def; i++) maxi(res, dp[i]); print(res); } /* */ int32_t main(){ ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); if (ifstream("input.txt").good()){ freopen("input.txt", "r", stdin); freopen("output.txt", "w", stdout); } int t; t = 1; while (t--){ solve(); nl; } }

Compilation message (stderr)

knapsack.cpp: In function 'int32_t main()':
knapsack.cpp:158:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  158 |         freopen("input.txt", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
knapsack.cpp:159:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  159 |         freopen("output.txt", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
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