제출 #1333363

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1333363		mefe123	Knapsack (NOI18_knapsack)	C++17	0 / 100	77 ms	124956 KiB

knapsack

    #include <bits/stdc++.h>

    //#define int long long
    #define endl '\n'
    #define pb push_back
    #define vc vector
    #define nn int n; cin>>n
    #define mm int m; cin>>m
    #define kk int k; cin>>k

    using namespace std;

    int mod=1e9+7;  
    int N=2*1e5+1;

    void ai(vector<int> &v){
        for(int i=1;i<v.size();i++){cin>>v[i];}
    }

    void solve(){
        int S,N;
        cin>>S>>N;
        vector<vector<pair<int,int>>> witem(S+1);
        for(int i=1;i<=N;i++){
            int v,w,k;
            cin>>v>>w>>k;
            witem[w].pb({v,k});
        }
        for(int i=1;i<=S;i++){
            sort(witem[i].begin(),witem[i].end(),[](pair<int,int> x,pair<int,int> y){
                return x.first>y.first;
            });
        }
        vector<pair<int,int>> item;
        for(int i=1;i<=S;i++){
            int t=0;
            int j=0;
            while(t<=S&&j<witem[i].size()){
                int v=witem[i][j].first;
                int k=witem[i][j].second;
                while(k--&&t<=S){
                    t+=i;
                    item.pb({v,i});
                }
                j++;
            }
        }
        vector<int> dp(S+1,0);
        for(int i=0;i<item.size();i++){
            int v=item[i].first;
            int w=item[i].second;
            for(int j=S;j>=0;j--){
                if(j+w<=S){
                    dp[j+w]=max(dp[j+w],dp[j]+v);
                }
            }
        }
        cout<<dp[S]<<endl;
    }

    signed main(){
        #ifndef ONLINE_JUDGE  
            freopen("input.txt", "r", stdin); 
            freopen("output.txt", "w", stdout);
            //freopen("superbull.in", "r", stdin);  
            //freopen("superbull.out", "w", stdout);
        #endif
        ios::sync_with_stdio(false);
        cin.tie(0); 
        cout.tie(0);
        int t=1; //cin>>t;
        while(t--){
            solve();
        }
    }

컴파일 시 표준 에러 (stderr) 메시지

knapsack.cpp: In function 'int main()':
knapsack.cpp:63:20: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   63 |             freopen("input.txt", "r", stdin);
      |             ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
knapsack.cpp:64:20: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |             freopen("output.txt", "w", stdout);
      |             ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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