Submission #844627

#	Time	Username	Problem	Language	Result	Execution time	Memory
844627		batsukh2006	Knapsack (NOI18_knapsack)	C++11	0 / 100	0 ms	344 KiB

knapsack

#include<iostream>
#include<stdio.h>
#include<math.h>
#include<map>
#include<string>
#include<algorithm>
#include<vector>
#include<string.h>
#include<utility>
#include<set>
#include<cmath>
#include<queue>
#include<deque>
#include<functional>
#include<stack>
#include<limits.h>
#include<iomanip>
#include<unordered_map> 
 
using namespace std;
 
#define MOD 1000000007
#define int long long
#define endl '\n'
bool scnd(pair<int, int> a, pair<int, int> b){
    if(a.first!=b.first) return(a.first<b.first);
    else return(a.second>b.second);
}
void solve(){
	int s,n; cin>>s>>n;
	vector<pair<int, int> > p[s+1];
	for(int i=0; i<n; i++){
		int v,w,k; cin>>v>>w>>k;
		p[w].push_back(make_pair(v,k));
	}
	vector<pair<int, int> > f;
	for(int i=1; i<=s; i++){
		sort(p[i].begin(),p[i].end(),scnd);
		for(int j=0,k=0; j<s/i; j++){
			if(j>=p[i].size()) break;
			if(p[i][k].second>0) f.push_back(make_pair(i,p[i][k].first)),p[i][k].second--;
			else k++,j--;
		}
	}
	vector<int> dp(s+1);
	for(int i=0; i<f.size(); i++){
		for(int j=s; j>=f[i].first; j--){
			dp[j]=max(dp[j],dp[j-f[i].first]+f[i].second);
		}
	}
	cout<<dp[s];
}	
signed main(){
	// freopen("file.in", "r", stdin);
	// freopen("file.out", "w", stdout);
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
 
	int t=1;
	// cin>>t;
	while(t--){
		solve();
		cout<<endl;
	}
	return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'void solve()':
knapsack.cpp:40:8: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |    if(j>=p[i].size()) break;
      |       ~^~~~~~~~~~~~~
knapsack.cpp:46:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |  for(int i=0; i<f.size(); i++){
      |               ~^~~~~~~~~

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