Submission #488364

#	Time	Username	Problem	Language	Result	Execution time	Memory
488364		ali22413836	Knapsack (NOI18_knapsack)	C++14	49 / 100	1088 ms	1920 KiB

knapsack

#include <bits/stdc++.h>
#define  endl "\n"
using namespace std ;
typedef long long ll;
typedef long double ld ;
const int N=2e7;
const ll inf=1e18 ;
const ll mod = 1e9 + 7 ;
ll mypower(ll x, ll y){
    if(y == 0) return 1 ;
    if(y == 1) return x ;
    ll ret = mypower(x , y / 2);
    ret = (ret * ret) % mod;
    if(y % 2) ret = ( ret * x ) % mod ;
    return ret ;
}
ll to , n , dp[2001][101] ;
ll wa[200009] , v[200009] , k[200009] ;
ll sol(ll ind , ll rem){
    if(rem < 0){
        return -1e18 ;
    }
    if(ind > n){
        return 0 ;
    }
    ll &ret = dp[rem][ind] ;
    if(ret != -1){
        return ret ;
    }
    for(int i = 0 ; i <= k[ind] ; i++ ){
        ret = max(ret , sol(ind +1 , rem - (i * wa[ind])) + (i * v[ind])) ;
    }
    return ret ;
}
int main(){
    ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    cin >> to >> n ;
    for(int i = 1 ; i <= n  ; i++){
        cin >> v[i] >> wa[i] >> k[i] ;
    }
    memset(dp , -1 , sizeof dp) ;
    ll ans = sol(1 , to) ;
    cout << ans << endl ;
    return 0 ;
}

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