Submission #497109

#	Time	Username	Problem	Language	Result	Execution time	Memory
497109		Blistering_Barnacles	Knapsack (NOI18_knapsack)	C++11	100 / 100	104 ms	49304 KiB

knapsack

//apig's property
//Happiness can be found, even in the darkest of times, if one only remembers to turn on the light
//El Pueblo Unido Jamas Sera Vencido
//Do or do not... there is no try
//Billions of bilious blue blistering barnacles in a thundering typhoon!
#include<bits/stdc++.h>
#define fast ios_base::sync_with_stdio(0) , cin.tie(0) , cout.tie(0)
#define F first
#define S second
#define pb push_back
#define vll vector< ll >
#define vpll vector< pll >
#define vi vector< int >
#define pll pair< ll , ll >
#define pi pair< int , int >
#define all(s) s.begin() , s.end()
#define sz(s) s.size()
#define str string
#define md ((s + e) / 2)
#define mid ((l + r) / 2)
#define msdp(dp) memset(dp , -1 , sizeof dp)
#define mscl(dp) memset(dp , 0 , sizeof dp)
#define C continue
#define R return
#define B break
#define lx node * 2
#define rx node * 2 + 1
#define br(o) o ; break
#define co(o) o ; continue
using namespace std;
typedef long long ll;
ll q, dp[2005][2005] , a[555555] , b[555555], k, l, m, n, o, p;
map < ll , ll > mp;
vpll W[555555];
const ll mod = 1e9+7;
ll s;
void solve(){
    cin >> s >> n ;
    ll mx = 0 ;
    for(ll i = 1 ; i <= n ; i++){
        cin >> p >> o >> k ;
        W[o].pb({p , k}) ;
        mx = max(mx , o) ;
    }
    dp[0][0] = 0 ;
    ll ans = 0 ;
    for(ll i = 1 ; i <= mx ; i++){
        sort(all(W[i])) ;
        reverse(all(W[i])) ;
        for(ll S = 0 ; S <= s ; S++){
            dp[i][S] = dp[i - 1][S] ;
            ll j = 0 , cnt = 1 , p = 0 , k = 0 ;
            while(i * cnt <= S && j < sz(W[i])){
                p += W[i][j].F ;
                dp[i][S] = max(dp[i][S] , dp[i - 1][S - cnt * i] + p) ;
                cnt++ , k++ ;
                ans = max(ans , dp[i][S]) ;
                if(k == W[i][j].S){
                    k = 0 ;
                    j++ ;
                }
            }
        }
    }
    cout << ans << endl ;
}
int main(){
    fast ;
    q = 1 ;
    //cin >> q ;
    while(q--){
        solve() ;
    }
}

Compilation message (stderr)

knapsack.cpp: In function 'void solve()':
knapsack.cpp:53:37: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |             while(i * cnt <= S && j < sz(W[i])){
      |                                     ^

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