Submission #1094924

#	Time	Username	Problem	Language	Result	Execution time	Memory
1094924		rayan_bd	Knapsack (NOI18_knapsack)	C++17	100 / 100	161 ms	35664 KiB

knapsack

#include <bits/stdc++.h>
using namespace std;
#pragma GCC optimize(2)
#pragma GCC optimize(3)
#pragma GCC optimize("Ofast")
#pragma GCC optimize("inline")
#pragma GCC optimize("-fgcse")
#pragma GCC optimize("-fgcse-lm")
#pragma GCC optimize("-fipa-sra")
#pragma GCC optimize("-ftree-pre")
#pragma GCC optimize("-ftree-vrp")
#pragma GCC optimize("-fpeephole2")
#pragma GCC optimize("-ffast-math")
#pragma GCC optimize("-fsched-spec")
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("-falign-jumps")
#pragma GCC optimize("-falign-loops")
#pragma GCC optimize("-falign-labels")
#pragma GCC optimize("-fdevirtualize")
#pragma GCC optimize("-fcaller-saves")
#pragma GCC optimize("-fcrossjumping")
#pragma GCC optimize("-fthread-jumps")
#pragma GCC optimize("-funroll-loops")
#pragma GCC optimize("-fwhole-program")
#pragma GCC optimize("-freorder-blocks")
#pragma GCC optimize("-fschedule-insns")
#pragma GCC optimize("inline-functions")
#pragma GCC optimize("-ftree-tail-merge")
#pragma GCC optimize("-fschedule-insns2")
#pragma GCC optimize("-fstrict-aliasing")
#pragma GCC optimize("-fstrict-overflow")
#pragma GCC optimize("-falign-functions")
#pragma GCC optimize("-fcse-skip-blocks")
#pragma GCC optimize("-fcse-follow-jumps")
#pragma GCC optimize("-fsched-interblock")
#pragma GCC optimize("-fpartial-inlining")
#pragma GCC optimize("no-stack-protector")
#pragma GCC optimize("-freorder-functions")
#pragma GCC optimize("-findirect-inlining")
#pragma GCC optimize("-fhoist-adjacent-loads")
#pragma GCC optimize("-frerun-cse-after-loop")
#pragma GCC optimize("inline-small-functions")
#pragma GCC optimize("-finline-small-functions")
#pragma GCC optimize("-ftree-switch-conversion")
#pragma GCC optimize("-foptimize-sibling-calls")
#pragma GCC optimize("-fexpensive-optimizations")
#pragma GCC optimize("-funsafe-loop-optimizations")
#pragma GCC optimize("inline-functions-called-once")
#pragma GCC optimize("-fdelete-null-pointer-checks")


#define ll long long
#define pb push_back
#define all(v) v.begin(), v.end()

const ll N_INF = -1e9;
const int mxN = 2005;

int N,S;
vector<pair<int,int>> itm[mxN];
vector<vector<ll>> dp(mxN,vector<ll>(mxN,-1));

ll f(int i,int tot){
	if(tot<0) return N_INF;
	if(i==S+1) return 0;
	if(dp[i][tot]!=-1) return dp[i][tot];
	ll ans=max(f(i+1,tot),0ll);
	ll taken_w=0,taken_p=0;
	for(auto it:itm[i]){
		ll p=it.first,c=it.second;
		while(c>0){
			taken_w+=i,taken_p+=p,--c;
			if(tot-taken_w<0){
				taken_w=-1;
				break;
			}
			ans=max(ans,f(i+1,tot-taken_w)+taken_p);
		}
		if(taken_w==-1) break;
	}
	return dp[i][tot]=ans;
}


int main() {

    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    

    int p,w,c;cin>>S>>N;
    // price,weight,copy
    for(ll i=0;i<N;++i){
    	cin>>p>>w>>c;
    	if(w<=S&&c>0) itm[w].pb({p,c});
    }
    for(ll i=0;i<=2001;++i) sort(all(itm[i]),greater<pair<ll,ll>>());
   	cout<<f(0,S);
    return 0;
}

Compilation message (stderr)

knapsack.cpp:24:39: warning: bad option '-fwhole-program' to pragma 'optimize' [-Wpragmas]
   24 | #pragma GCC optimize("-fwhole-program")
      |                                       ^
knapsack.cpp:31:41: warning: bad option '-fstrict-overflow' to pragma 'optimize' [-Wpragmas]
   31 | #pragma GCC optimize("-fstrict-overflow")
      |                                         ^
knapsack.cpp:33:41: warning: bad option '-fcse-skip-blocks' to pragma 'optimize' [-Wpragmas]
   33 | #pragma GCC optimize("-fcse-skip-blocks")
      |                                         ^
knapsack.cpp:47:51: warning: bad option '-funsafe-loop-optimizations' to pragma 'optimize' [-Wpragmas]
   47 | #pragma GCC optimize("-funsafe-loop-optimizations")
      |                                                   ^
knapsack.cpp:63:19: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   63 | ll f(int i,int tot){
      |                   ^
knapsack.cpp:63:19: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
knapsack.cpp:63:19: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
knapsack.cpp:63:19: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
knapsack.cpp:85:10: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   85 | int main() {
      |          ^
knapsack.cpp:85:10: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
knapsack.cpp:85:10: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
knapsack.cpp:85:10: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]

• Subtask 1: 12 / 12
• Subtask 2: 17 / 17
• Subtask 3: 20 / 20
• Subtask 4: 24 / 24
• Subtask 5: 27 / 27