제출 #985773

#제출 시각아이디문제언어결과실행 시간메모리
985773lftroqKnapsack (NOI18_knapsack)C++14
100 / 100
61 ms35120 KiB
#include <bits/stdc++.h> #define fastIO ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL); #define endl '\n' #define fi first #define se second using namespace std; typedef long long ll; const int INF=1e9; ll dp[2001][2001]; void solve() { int s,n; cin >> s >> n; map<int,vector<pair<int,int>>> bw; for(int i=0;i<n;i++) { int v,w,k; cin >> v >> w >> k; if(w<=s&&k) bw[w].push_back({v,k}); } for(int i=0;i<=(int)bw.size();i++) for(int j=0;j<=s;j++) dp[i][j]=-INF; dp[0][0]=0; int p=0; for(map<int,vector<pair<int,int>>>::iterator it=bw.begin();it!=bw.end();it++) { p++; int w=it->fi; vector<pair<int,int>> temp=it->se; sort(temp.begin(),temp.end(),greater<pair<int,int>>()); for(int i=0;i<=s;i++) { dp[p][i]=dp[p-1][i]; int c=0,t=0,cr=0; ll pr=0; while((c+1)*w<=i&&t<(int)temp.size()) { c++; pr+=temp[t].fi; if(dp[p-1][i-c*w]!=-INF) dp[p][i]=max(dp[p][i],dp[p-1][i-c*w]+pr); cr++; if(cr==temp[t].se) { cr=0; t++; } } } } ll ans=-1e16; for(int i=0;i<=s;i++) ans=max(ans,dp[p][i]); cout << ans << endl; } int main() { fastIO solve(); return 0; }
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