Submission #975778

#	Time	Username	Problem	Language	Result	Execution time	Memory
975778		Isam	Knapsack (NOI18_knapsack)	C++17	73 / 100	157 ms	262144 KiB

knapsack

#include<bits/stdc++.h>
using namespace std;
 
#define eb emplace_back
#define int long long

constexpr int sz = 1e5 + 5;
constexpr int inf = (int)1E9;

int n, s;

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

int tot;
array<int, 2> b[sz * 1000];

int 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, 2000ll);
		
		a[i].k = min(a[i].k, s / a[i].w);
		
		for(register int j = 1; j <= a[i].k; ++j){
			b[++tot] = array<int, 2>{a[i].w, a[i].v};
		}
		
		
	}
	
	for(register int i = 1; i <= 2000; ++i){
		dp[i] = -inf;
	}
	
	for(register int i = 1; i <= tot; ++i){
		for(register int j = s; j >= b[i][0]; --j){
			dp[j] = max(dp[j], dp[j - b[i][0]] + b[i][1]);
		}
	}
	
	int 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:31:20: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   31 |   for(register int j = 1; j <= a[i].k; ++j){
      |                    ^
knapsack.cpp:38:19: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   38 |  for(register int i = 1; i <= 2000; ++i){
      |                   ^
knapsack.cpp:42:19: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   42 |  for(register int i = 1; i <= tot; ++i){
      |                   ^
knapsack.cpp:43:20: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   43 |   for(register int j = s; j >= b[i][0]; --j){
      |                    ^

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