Submission #209525

#	Time	Username	Problem	Language	Result	Execution time	Memory
209525		model_code	Knapsack (NOI18_knapsack)	C++14	100 / 100	93 ms	3576 KiB

knapsack

#include <bits/stdc++.h>
#define MAXN 100004
#define MAXS 2004
using namespace std;
int s,n,w[MAXN];
long long v[MAXN],k[MAXN],dp[MAXS];
typedef pair<int,int> ii;
priority_queue <ii> pq[MAXS];
int main(){
	scanf("%d %d",&s,&n);
	for(int x=0;x<n;x++){
		scanf("%lld %d %lld",&v[x],&w[x],&k[x]);
		pq[w[x]].push(make_pair(v[x],k[x]));
	}
	for(int x=1;x<=s;x++){
		long long cnt=s/x;
		while(!pq[x].empty()&&cnt){
			ii i=pq[x].top();
			pq[x].pop();
			if(i.second>cnt) i.second=cnt;
			cnt-=i.second;
			for(int y=0;y<i.second;y++)	for(int z=s;z>=x;z--) dp[z]=max(dp[z],dp[z-x]+i.first);
		}
	}
	long long ans=0;
	for(int x=1;x<=s;x++) ans=max(ans,dp[x]);
	printf("%lld\n",ans);
	return 0;
} 

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:10:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&s,&n);
  ~~~~~^~~~~~~~~~~~~~~
knapsack.cpp:12:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld %d %lld",&v[x],&w[x],&k[x]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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