제출 #987503

#제출 시각아이디문제언어결과실행 시간메모리
987503DeadlyCriticKnapsack (NOI18_knapsack)C++17
73 / 100
1059 ms2692 KiB
#include <bits/stdc++.h> #define scan(a, __n) for(int __ = 0; __ < __n; __++)cin >> a[__]; // #define print(a, __n) for(int ___ = 0; ___ < __n; ___++)cout << a[___] << ' '; cout << '\n'; // #define int ll #define fastIO ios::sync_with_stdio(false), cin.tie(NULL), cout.tie(NULL); // #define fr first // #define sc second #define all(v) v.begin(), v.end() // #define c0 (v<<1) // #define c1 (c0|1) // #define md ((l+r)/2) typedef long long ll; typedef double ld; using namespace std; const int mod = 1e9+7; const int maxN = 2007; // const int maxFac = maxN; // ll fac[maxFac], _fac[maxFac]; // ll po(ll b, ll p){ // b %= mod; // p %= mod-1; // ll r = 1; // while(p){ // if(p&1)r = r*b%mod; // p >>= 1; // b = b*b%mod; // } // return r; // } // ll choose(ll k, ll n){ // return fac[n]*_fac[k]%mod*_fac[n-k]%mod; // } // ll factorial(ll n, ll k){ // ll ret = 1; // for(ll i = n; i >= n-k+1; i--){ // ret = ret*i%mod; // } // return ret; // } int dp[maxN]; deque<pair<int, int>> dq[maxN]; int v, w, k; void add(int val, int i, int ind){ while(dq[ind].size() > 0 && dq[ind].front().second <= val){ // if(ind == 0)cout << "rem1 " << dq[0].front().first << '\n'; dq[ind].pop_front(); } dq[ind].push_front({i, val}); // if(ind == 0)cout << "add " << dq[0].front().first << '\n'; } void rem(int i, int ind){ if(dq[ind].back().first <= i){ // if(ind == 0)cout << "rem2 " << dq[0].back().first << '\n'; dq[ind].pop_back(); } } int lazy[maxN]; void slv(){ int s, n; cin >> s >> n; for(int i = 0; i < n; i++){ cin >> v >> w >> k; for(int i = 0, ind = 0; i <= s; i++, ind = (ind == w-1?0:ind+1)){ lazy[ind] += v; add(dp[i]-lazy[ind], i, ind); if(i >= w*1ll*k+w){ rem(i-w*k-w, ind); } dp[i] = dq[ind].back().second+lazy[ind]; } for(int i = 0; i < w; i++)dq[i].clear(), lazy[i] = 0; } cout << dp[s] << endl; } signed main(){ // freopen("time.in", "r", stdin); // freopen("time.out", "w", stdout); // fastIO; // cout << fixed << setprecision (15); // fac[0] = 1; // for(int i = 1; i < maxFac; i++)fac[i] = fac[i-1]*i%mod; // _fac[maxFac-1] = po(fac[maxFac-1], mod-2); // for(int i = maxFac-2; i >= 0; i--)_fac[i] = _fac[i+1]*(i+1)%mod; // w[0] = 1; // for(int i = 1; i < maxN; i++)w[i] = w[i-1]*p%mod; // _w[maxN-1] = po(w[maxN-1], mod-2); // for(int i = maxN-2; i >= 0; i--)_w[i] = _w[i+1]*p%mod; int t = 1; // cin >> t; while(t--){ // cout << "**S" << endl; // cout << slv() << '\n'; slv(); // string s; // cin >> s; // bool x = slv(); // cout << (x?"YES":"NO") << '\n'; } } /* */
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