제출 #1368452

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1368452		temurbek1371	Knapsack (NOI18_knapsack)	C++20	100 / 100	30 ms	3296 KiB

knapsack

#include <bits/stdc++.h>
// #pragma GCC optimize("Ofast") 
// #pragma GCC target("avx,avx2,fma")
// #include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/tree_policy.hpp>
// using namespace __gnu_pbds;
using namespace std;
#define int long long
#define vi vector<int>
#define vvi vector<vi>
#define vvvi vector<vvi>
#define vb vector<bool>
#define all(x) x.begin(), x.end()
#define allr(x) x.rbegin(), x.rend()
#define endl '\n'
#define maxx(x) *max_element(all(x))
#define pii pair<int,int>
#define minn(x) *min_element(all(x))
#define vpii vector<pii>
#define di deque<int>
#define mii map<int,int>
#define vap(x) vector<array<int,x>>
constexpr int MOD = (1e9 + 7);
constexpr int inf = 1e18;
void fast_io() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
}
ostream& operator<<(ostream& out, vi& a) {
    for (int i = 0; a.size() > i; i++)out << a[i] << ' ';
    return out;
}
ostream& operator<<(ostream& out, vector<vi>& a) {
    for (auto& row : a) {
        for (auto& elem : row) out << elem << ' ';
        out << '\n';
    }
    return out;
}
istream& operator>>(istream& in, vi& a) {
    for (int i = 0; a.size() > i; i++) in >> a[i];
    return in;
}
istream& operator>>(istream& in, vector<vi>& a) {
    for(int i = 0;i<a.size();i++){
        for(int j = 0;j<a[i].size();j++){
            in >> a[i][j];
        }
    }
    return in;
}
int sumofvecor(vi a){
    int sm = 0;
    for(int i = 0;i<a.size();i++)sm+=a[i];
    return sm;
}
bool isprime(int number){
    for(int i = 2;i*i<=number;i++){
        if(number%i==0)return false;
    }
    return number>=2;
}
void file_io() {
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
}
void solve();
signed main(signed argc, char *argv[]) {
    clock_t start = clock();
    fast_io();
    // file_io();
    if (argc > 1 && string(argv[1]) == "gg") file_io();
    int test = 1;
    // cin >> test;
    while (test--) {
        solve();
    }
    cerr << "Vaqt " << double(clock() - start) / double(CLOCKS_PER_SEC) * 1000 << " ms\n";
}
void solve(){
    int s,n;
    cin>>s>>n;
    vap(3) a(n);
    for(int i = 0;i<n;i++)cin>>a[i][0]>>a[i][1]>>a[i][2];
    sort(allr(a));
    vvi have(s+1);
    for(auto [v,w,k]:a){
        while(have[w].size()<s/w && k>0){
            k--;
            have[w].push_back(v);
        }
    }
    vi dp(s+1,-1);
    dp[0]=0;
    vi vs,ws;
    for(int i = 1;i<=s;i++){
        for(int j:have[i]){
            vs.push_back(j);
            ws.push_back(i);
        }
    }
    // cout<<vs<<endl<<ws<<endl;
    for(int i = 0;i<vs.size();i++){
        for(int j = s;j>=ws[i];j--){
            if(dp[j-ws[i]]!=-1)dp[j]=max(dp[j],dp[j-ws[i]]+vs[i]);
        }
    }
    cout<<maxx(dp)<<endl;
    // cout<<have;
}

컴파일 시 표준 에러 (stderr) 메시지

knapsack.cpp: In function 'void file_io()':
knapsack.cpp:65:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   65 |     freopen("input.txt", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
knapsack.cpp:66:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   66 |     freopen("output.txt", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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