Submission #844067

#	Time	Username	Problem	Language	Result	Execution time	Memory
844067		now_or_never	Knapsack (NOI18_knapsack)	C++14	37 / 100	1 ms	600 KiB

knapsack

#include<bits/stdc++.h>
#define ll long long
using namespace std;
const int maxn=1e4+1;
int n, m;
vector<int> w, v;
ll f[maxn];
void solve(int x, int y, int z)
{
int tmp=1;
while(1)
{
if(z - tmp>=0){
w.push_back(tmp*x);
v.push_back(tmp*y);
z-=tmp;
tmp*=2;
} else break;
}
if(z){
w.push_back(z*x);
v.push_back(z*y);
}
}
int main()
{
ios::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
cin>>m>>n;
for(int i=1;i<=n;i++)
{
int x, y, z; cin>>y>>x>>z;
solve(x, y, z);
}
for(int i=0; i<w.size(); i++)
for(int j=m; j>=w[i]; j--)
f[j]=max(f[j], f[j-w[i]] + v[i]);
cout<<f[m];
return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:35:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 | for(int i=0; i<w.size(); i++)
      |              ~^~~~~~~~~

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