Submission #975810

#	Time	Username	Problem	Language	Result	Execution time	Memory
975810		Isam	Knapsack (NOI18_knapsack)	C++17	73 / 100	1060 ms	1636 KiB

knapsack

#pragma GCC optimize("Ofast,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt,fma")
#include<bits/stdc++.h>
using namespace std;
 
#define eb emplace_back
//#define int long long


inline int read() {
  //  opt = 0;
    char ch = getchar();
    int x = 0, f = 1;
    while (ch < '0' || ch > '9') {
        if (ch == '-') f = -1;
        ch = getchar();
    }
    while ('0' <= ch && ch <= '9') {
        x = (x << 1) + (x << 3) + ch - '0';
        ch = getchar();
    }
    //if (ch == ' ') opt = 1;
    return x * f;
}

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(){
	s = read(), n = read();
	for(register int i = 1; i <= n; ++i){
		a[i].v = read(), a[i].w = read(), a[i].k = read();
		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:40:19: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   40 |  for(register int i = 1; i <= n; ++i){
      |                   ^
knapsack.cpp:45:19: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   45 |  for(register int i = 1; i <= 2001; ++i){
      |                   ^
knapsack.cpp:49:19: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   49 |  for(register int i = 1; i <= n; ++i){
      |                   ^
knapsack.cpp:50:20: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   50 |   for(register int ki = 1; ki <= a[i].k; ++ki)
      |                    ^~
knapsack.cpp:51:21: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   51 |    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