제출 #1355147

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1355147		bnd2100	Knapsack (NOI18_knapsack)	C++20	73 / 100	8 ms	2740 KiB

knapsack

/*
* @Author: Twynzz
* @Last Modified by: Twynzz
* @Note For This Problem: https://aistudio.google.com/prompts/1-Jr1qoiKenShfOc7xFvDMsuL9aJSw3Xg
*/


#include <bits/stdc++.h>
using namespace std;

char __ST__;
extern char __EN__;

// ------------ Define ------------

#define int long long
#define ll long long
#define ld long double
#define str string
#define file(name) {freopen(name".inp","r",stdin);freopen(name".out","w",stdout);}
#define IOS {std::ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);}
#define _TBN_ signed main()
#define setp(n) setprecision(n)<< fixed
#define fi first
#define se second
#define ii pair<int,int>
#define gcd(a,b) __gcd(a,b)
#define iii tuple<int, int, int>
#define pb push_back
#define pf push_front
#define eb emplace_back
#define sz(v) (int)v.size()
#define el "\n"
#define all(x) x.begin(),x.end()

const long long oo = 1e18;
const int MOD = 1e9+7, Mod = 998244353;
const int base = 311, base2 = 293;

template<class X>
    bool maximize(X &a, const X &b)
    {
        if (a<b)
        {
            a = b;
            return 1;
        }
        return 0;
    }

template<class X>
    bool minimize(X &a, const X &b)
    {
        if (a>b)
        {
            a = b;
            return 1;
        }
        return 0;
    }

namespace sub1
{
    bool checkSub1();
    void sub1();
}
namespace sub2
{
    bool checkSub2();
    void sub2();
}
namespace sub3
{
    bool checkSub3();
    void sub3();
}

int lcm(int a, int b)
{
    return a/gcd(a,b)*b;
}

int sqr(int x) {return x*x;}

inline bool MASK(int mask, int bit) {return ((mask>>bit)&1);}
inline long long F(int n) {return n*(n+1)/2;}
inline int add(int a, int b, int m = MOD)
{
    return ((a % m + b % m) % m + m) % m;
}
inline int sub(int a, int b, int m = MOD)
{
    return ((a % m - b % m) % m + m) % m;
}
inline int mul(int a, int b, int m = MOD)
{
    return (((a % m) * (b % m)) % m + m) % m;
}

int dx[] = {0, 0, -1, 1};
int dy[] = {-1, 1, 0, 0};

const int maxn = 1e6 + 9;
const int N = 1e5 + 9;

// ------------ Code ------------

int n, s, v[maxn], w[maxn], k[maxn];
_TBN_
{
    IOS;
    if (fopen("post.inp","r")) file("post");
    cin >>s >>n;
    for(int i = 1; i <= n; i++) cin >>v[i] >>w[i] >>k[i];
    for(int i = 1; i <= 1; i++)
    {
        if (sub1::checkSub1()) {sub1::sub1(); continue;}
        if (sub2::checkSub2()) {sub2::sub2(); continue;}
        if (sub3::checkSub3()) {sub3::sub3(); continue;}
    }
    cerr << "\nStatic memory used: " << fixed << setprecision(3) << ((&__EN__ - &__ST__) / (1.0L * 1024 * 1024)) << "mb\n";
    return 0;
}

namespace sub1
{
    bool checkSub1()
    {
        return n <= 100;
    }
    int dp[maxn];
    void sub1()
    {
        for(int j = 0; j <= s; j++)
            dp[j] = -oo;
        dp[0] = 0;
        for(int i = 1; i <= n; i++)
        {
            int rem = k[i];
            for(int p = 1; rem > 0; p <<= 1)
            {
                int cap = min(p, rem);
                int W = w[i] * cap, val = v[i] * cap;
                for(int j = s; j >= W; j--)
                    maximize(dp[j], dp[j - W] + val);
                rem -= cap;
            }
        }
        int ans = -oo;
        for(int j = 0; j <= s; j++)
            maximize(ans, dp[j]);
        cout<< ans<< el;
    }
}

namespace sub2
{
    bool checkSub2()
    {
        return 1;
    }
    void sub2()
    {
        
    }
}

namespace sub3
{
    bool checkSub3()
    {
        return 1;
    }
    void sub3()
    {
        
    }
}



char __EN__;

컴파일 시 표준 에러 (stderr) 메시지

knapsack.cpp: In function 'int main()':
knapsack.cpp:20:28: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 | #define file(name) {freopen(name".inp","r",stdin);freopen(name".out","w",stdout);}
      |                     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
knapsack.cpp:112:32: note: in expansion of macro 'file'
  112 |     if (fopen("post.inp","r")) file("post");
      |                                ^~~~
knapsack.cpp:20:58: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 | #define file(name) {freopen(name".inp","r",stdin);freopen(name".out","w",stdout);}
      |                                                   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
knapsack.cpp:112:32: note: in expansion of macro 'file'
  112 |     if (fopen("post.inp","r")) file("post");
      |                                ^~~~

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