제출 #886640

#제출 시각아이디문제언어결과실행 시간메모리
886640DP_196Knapsack (NOI18_knapsack)C++14
0 / 100
2 ms604 KiB
#include <bits/stdc++.h> using namespace std; #define sz(x) (int)x.size() #define MASK(i) ((1LL) << (i)) #define all(x) x.begin(), x.end() #define BIT(x, i) ((x) >> (i) & (1LL)) #define dbg(...) cerr << "#" << __LINE__ << ":[" << #__VA_ARGS__ \ << "] = [" ,DBG(__VA_ARGS__) string to_string(const string& s) { return '"' + s + '"'; } void DBG() { cerr << "]" << endl; } template<class H, class... T> void DBG(H h, T... t) { cerr << to_string(h); if(sizeof...(t)) cerr << ", "; DBG(t...); } template <class T> inline bool maximize(T &a, const T &b) { return (a < b ? (a = b) : 0); } template <class T> inline bool minimize(T &a, const T &b) { return (a > b ? (a = b) : 0); } const int MAXN = 2e5 + 6; const int MAXM = 4e6; const int INF = 1e9; const int MOD = 1e9 + 7; int n, k; vector<pair<int, int>> value[2005]; int f[2005][2005]; // f[i][j] //là giá trị dinh dưỡng lớn nhất khi dùng j tiền, //và xét lần lượt đến thực phẩm có giá là i void solve() { cin >> k >> n; for (int i = 1; i <= n; i++) { int c, e, l; cin >> c >> e >> l; l = min(l, (int) (k / c) + 1); value[c].push_back(make_pair(e, l)); } for (int i = 1; i <= k; i++) { sort(value[i].begin(), value[i].end()); reverse(value[i].begin(), value[i].end()); } for (int cost = 1; cost <= k; cost++) { int sum = 0; for (int j = 1; j <= k; j++) f[cost][j] = f[cost - 1][j]; for (auto it : value[cost]) { int nutri = it.first, cnt = it.second; for (int i = 1; i <= k; i++) { for (int j = 1; j <= min(cnt, (int)(i / cost)); j++) { if (sum + j > (k / cost)) break; f[cost][i] = max(f[cost][i], f[cost - 1][i - cost * j] + j * nutri); } } sum += cnt; if (sum > (k / cost)) break; } } cout << f[k][k]; } #define TASK "a" int main() { ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); // freopen(TASK".inp", "r", stdin); // freopen(TASK".out", "w", stdout); int ntest = 1; //cin >> ntest; while (ntest--) solve(); return 0; } //612
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