#include <bits/stdc++.h>
#define f first
#define s second
#define pb push_back
#define int long long
#define pii pair<int, int>
using namespace std;
const int N = 5e5 + 5, M = 1e9 + 7;
int T, n, s, dp[2003];
vector<pii> d[N], b;
main()
{
std::ios::sync_with_stdio(0);
cin.tie(0);
int i;
cin >> s >> n;
for(i = 0; i < n; i++)
{
int v, w, k;
cin >> v >> w >> k;
d[w].pb({v, k});
}
for(i = 1; i <= s; i++)
{
sort(d[i].begin(), d[i].end());
reverse(d[i].begin(), d[i].end());
int w = 0, sv = 0;
for(auto [v, k] : d[i])
{
while(w < s && k)
{
w += i, sv += v;
b.pb({w, sv});
k--;
}
}
for(int j = s; j >= 0; j--)
{
for(auto [w, v] : b)
if(j >= w) dp[j] = max(dp[j], dp[j - w] + v);
}
b.clear();
}
cout << dp[s] << '\n';
}
컴파일 시 표준 에러 (stderr) 메시지
knapsack.cpp:13:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
13 | main()
| ^~~~
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