Submission #471002

#	Time	Username	Problem	Language	Result	Execution time	Memory
471002		Shogun3103	Knapsack (NOI18_knapsack)	C++17	0 / 100	1 ms	716 KiB

knapsack

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

void setIO(string fileName = ""){
    if(fileName.length()){
        freopen((fileName+".in").c_str(), "r", stdin);
        freopen((fileName+".out").c_str(), "w", stdout);
    }
}

#define ll long long
#define ld long double
#define FOR(i,a,b) for(__typeof(b) i=a; i<=b; i++)
#define FOD(i,a,b) for(__typeof(b) i=b; i>=a; i--)
#define EACH(u, v) for(auto& u : v)
#define sz(x) ((int)(x).size())
#define all(x) (x).begin(), (x).end()
#define pb push_back
#define ii pair<int,int>
#define iii pair<int,ii>
#define ld2 pair<ld, ld>
#define ll2 pair<ll, ll>
#define X first
#define Y second
#define ed "\n"
#define sp " "
const int oo1 = 1e9 + 7;
const int oo2 = 1e9 + 9;
const int N = 1e5 + 1;
const int M = 5e6 + 1;

struct Data {
    int v, w, k;
};

Data a[N];
int s, n;
ll dp[N][2001];


void solve()
{
    cin >> s >> n;
    FOR(i, 1, n) cin >> a[i].v >> a[i].w >> a[i].k;
    
    FOR(i, 1, n) {
        FOR(j, 0, s) {
            if(j - a[i].w >= 0)
                dp[i][j] = max(dp[i][j], dp[i-1][j-a[i].w] + a[i].v);
            else
                dp[i][j] = dp[i-1][j];
        }
    }
    cout << dp[n][s];
}          

int main()
{ 
    ios_base::sync_with_stdio(false), cin.tie(0), cout.tie(0);        
    setIO("");
    int t; 
    t = 1;
    //cin >> t;
    FOR(i, 1, t) {
        solve();
    }
    return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'void setIO(std::string)':
knapsack.cpp:7:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 |         freopen((fileName+".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
knapsack.cpp:8:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    8 |         freopen((fileName+".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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