Submission #975808

#	Time	Username	Problem	Language	Result	Execution time	Memory
975808		Isam	Knapsack (NOI18_knapsack)	C++17	73 / 100	1067 ms	1552 KiB

knapsack

//#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("Ofast")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#include<bits/stdc++.h>
using namespace std;
 
#define eb emplace_back
//#define int long long

constexpr int sz = 1e5 + 5;
constexpr long long inf = (long long)1E18 + 7;

int n, s;

struct ou{
	int v, w, k;
} a[sz];

long long dp[2005];


signed main(){
	ios_base::sync_with_stdio(0), cin.tie(0);
	cin >> s >> n;
	for(register int i = 1; i <= n; ++i){
		cin >> a[i].v >> a[i].w >> a[i].k;
		a[i].k = min(a[i].k, s / a[i].w);
	}
	
	for(register int i = 1; i <= 2001; ++i){
		dp[i] = -inf;
	}
	
	for(register int i = 1; i <= n; ++i){
		for(register int ki = 1; ki <= a[i].k; ++ki)
			for(register int j = s; j >= a[i].w; --j){
				dp[j] = max(dp[j], dp[j - a[i].w] + a[i].v);
			}
	}
	
	long long ans = *max_element(dp, dp+s+1);
	
	cout << ans << '\n';
	
}

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:25:19: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   25 |  for(register int i = 1; i <= n; ++i){
      |                   ^
knapsack.cpp:30:19: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   30 |  for(register int i = 1; i <= 2001; ++i){
      |                   ^
knapsack.cpp:34:19: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   34 |  for(register int i = 1; i <= n; ++i){
      |                   ^
knapsack.cpp:35:20: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   35 |   for(register int ki = 1; ki <= a[i].k; ++ki)
      |                    ^~
knapsack.cpp:36:21: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   36 |    for(register int j = s; j >= a[i].w; --j){
      |                     ^

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