Submission #924981

#	Time	Username	Problem	Language	Result	Execution time	Memory
924981		doducanh	Knapsack (NOI18_knapsack)	C++14	100 / 100	91 ms	2168 KiB

knapsack

#include<bits/stdc++.h>
using namespace std;
vector<pair<int,int>>a[2005];
int dp[2005];
int s,n;
main()
{
    cin>>s>>n;
    for(int i=1;i<=n;i++){
        int v,w,k;
        cin>>v>>w>>k;
        a[w].push_back({v,k});
    }
    memset(dp,0,sizeof(dp));
    for(int i=0;i<=s;i++){
        if(!a[i].size())continue;
        sort(a[i].begin(),a[i].end(),greater<pair<int,int>>());
        int id=0;
        for(int j=0;j*i<s;j++){
            if(id>=a[i].size())break;
            for(int k=s;k>=i;k--){
                dp[k]=max(dp[k],dp[k-i]+a[i][id].first);
            }
            a[i][id].second--;
            if(a[i][id].second==0)id++;
        }
    }
    cout<<dp[s];
}

Compilation message (stderr)

knapsack.cpp:6:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    6 | main()
      | ^~~~
knapsack.cpp: In function 'int main()':
knapsack.cpp:20:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |             if(id>=a[i].size())break;
      |                ~~^~~~~~~~~~~~~

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