Submission #955566

#	Time	Username	Problem	Language	Result	Execution time	Memory
955566		haileyy	Knapsack (NOI18_knapsack)	C++14	37 / 100	1 ms	600 KiB

knapsack

//https://oj.uz/problem/view/NOI18_knapsack
#include <bits/stdc++.h>

#define loop(i, l, r) for(int i = (l); i < (r); ++i)
#define pool(i, l, r) for(int i = (l); i > (r); --i)
#define debug(x) cerr << #x << ": " << x << endl;
using namespace std;
int n,s;
vector<pair<int,int>> items;
const int MAXS = 2005;//
int dp[MAXS];
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cin>>s>>n;
    int v,w,k;
    loop(i,0,n){
        cin>>v>>w>>k;
        int a = log2(k);
        loop(j,0,a){
            items.push_back({(1<<j)*w,(1<<j)*v});
        }
        int b = k-(1<<a)+1;
        items.push_back({b*w,b*v});
    }
    loop(i,0,items.size()){
        pool(j,s,items[i].first-1){
            dp[j] = max(dp[j],dp[j-items[i].first]+items[i].second);
        }
    }
    cout<<dp[s]<<endl;
    return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:4:42: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    4 | #define loop(i, l, r) for(int i = (l); i < (r); ++i)
      |                                          ^
knapsack.cpp:27:5: note: in expansion of macro 'loop'
   27 |     loop(i,0,items.size()){
      |     ^~~~

• Subtask 1: 0 / 12
• Subtask 2: 17 / 17
• Subtask 3: 20 / 20
• Subtask 4: 0 / 24
• Subtask 5: 0 / 27