제출 #951258

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
951258		YourEternalReward	Knapsack (NOI18_knapsack)	C++14	12 / 100	2 ms	4700 KiB

knapsack

/*

               .;;;;:
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              ;::::::;
               :;;;;.
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                 ;:::::;;                                                           ;;;
                ::::::::::;;                                                       ;:::
                ;:::::::::::;;:                                                  .;;:::
               .;::::::::::::::;;.                  .:.::::                   ;;;:::;;;
               :;:::::::::::::::::;;.            :. .::::....:            :;;::::::::;
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              :;::::::::........::::::::::::::. :. .. ...  .  .....;;;:::::::::::::::;
              ;::::::::..........::::::::::::: ....   .....   .....:::::::::::::::::;:
             .;:::::::...........::::::::::::  :.. ...    ...........:::::::::::::::;.
            ......................::::::::::: ..   ....    ..............:::::::::::;
            ..........:::.......:::::::::::::. . ..    ....    ............:::::::::;
            ..........::::::::::::::::.......: .:....    ...    ........ .:  ::::::;;
              ........:::::::::::::...........:. ::. ....   ....    ....   .: .::::;:
              .......:::::::::::::..............::. .::..     ..    ....    .:..:::;:
               ...::::::::::::::::..:::....::....::::.   :....   ....   ....  : ::.
               ;::::::::::::::::::..::.....:::...::::::::. .:.    ...   ..... .. .
              :;::::::::;;   .;:::::............:::::::::::  :....    ... ..  :.:
              ;:::::::;.        ;;:::.......:::::;;;;..;;;::. :....   ....   ...:
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              ;;::;:    :;;;;;;                               .;::::::::::::;
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                .;;;.....;;;;;;       ...                      .;:::::::::;.
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                  ::.........;;+:....:; .:..::        .::..;           ;::;:;;:
                  ;:...........::;;;;;:  .:: .;      ::..:. :.       ;:::;.  :.
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                  .. ::.;:.;:     .::;;;                      ;;;:::;;.
                ::.;   :;;;;:::........;                      ;:::;:
               .;...::::........;:.....:;                     ;:
*/

#include<bits/stdc++.h>
#define ll long long
#define endl '\n'
#define rep(i,a,b) for(int i=a; i<=b; ++i)
#define rev(i,b,a) for(int i=b; i>=a; --i)
#define pii pair<ll,ll>
using namespace std;
const int maxN = 1e6 + 7;
const ll inf = 1e9 + 7;
const ll moreinf = 1e16 + 7;

struct data{
    ll V,W,K;
}a[maxN];

int n,s;
ll f[5002][2002];
vector<pii> item[2002];
 
int main(){
    ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
   
    cin >> s >> n;
    rep(i,1,n) cin >> a[i].V >> a[i].W >> a[i].K;
    rep(i,1,n){
        item[a[i].W].emplace_back(a[i].V, a[i].K);
    } 
    rep(i,1,s){
        sort(begin(item[i]),end(item[i]), [](pii a, pii b)->bool{
            return a.first > b.first;
        });
    }
    vector<pii> use_item;
    rep(weight,1,s){
        int cnt = 0;
        for(auto it:item[weight]){
            rep(i,1,it.second){
                ++cnt;
                use_item.emplace_back(it.first,weight);
                if(cnt>=s/weight) break;
            }
            if(cnt>=s/weight) break;
        }   
    }
    rep(i,0,use_item.size()-1){
        rep(j,0,s){
            f[i][j] = f[i-1][j];
            if(j>=use_item[i].second) f[i][j] = max(f[i][j], f[i-1][j-use_item[i].second] + use_item[i].first);
        }
    }
    ll maxx = 0;
    rep(i,0,use_item.size()-1) maxx = max(maxx,f[i][s]);
    cout << maxx;
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

knapsack.cpp: In function 'int main()':
knapsack.cpp:53:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 | #define rep(i,a,b) for(int i=a; i<=b; ++i)
......
   94 |     rep(i,0,use_item.size()-1){
      |         ~~~~~~~~~~~~~~~~~~~~~     
knapsack.cpp:94:5: note: in expansion of macro 'rep'
   94 |     rep(i,0,use_item.size()-1){
      |     ^~~
knapsack.cpp:53:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 | #define rep(i,a,b) for(int i=a; i<=b; ++i)
......
  101 |     rep(i,0,use_item.size()-1) maxx = max(maxx,f[i][s]);
      |         ~~~~~~~~~~~~~~~~~~~~~     
knapsack.cpp:101:5: note: in expansion of macro 'rep'
  101 |     rep(i,0,use_item.size()-1) maxx = max(maxx,f[i][s]);
      |     ^~~

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