Submission #486905

#TimeUTC-0UsernameProblemLanguageResultExecution timeMemory
4869052021-11-13 09:07:05YHC2538Knapsack (NOI18_knapsack)C++14
100 / 100
118 ms3632 KiB
#include <bits/stdc++.h>
using namespace std;
void _debug(){cerr<<'\n';}
template<typename A,typename...B>
void _debug(A a,B...b){cerr<<a<<' ',_debug(b...);}
#define debug(args...) cerr<<"("<<(#args)<<"): ", _debug(args);
#define pii pair<int,int>
#define all(x) (x).begin(),(x).end()
typedef long long ll;
const int N=2005;
ll dp[N];
int main(){
int s,n; cin>>s>>n;
vector<vector<pii>> weight(s+1);
for(int i=1;i<=n;i++){
int v,w,k; cin>>v>>w>>k;
weight[w].push_back({v,k});
}
for(int i=1;i<=s;i++){
sort(all(weight[i]),greater<pii>());
if(weight[i].size()==0) continue;
int id=0; //next item with weight i
for(int j=1;j*i<=s;j++){
if(id>=weight[i].size()) break;
for(int k=s;k>=i;k--){
dp[k]=max(dp[k],dp[k-i]+weight[i][id].first);
}
if(--weight[i][id].second==0) id++;
}
}
 
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Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:24:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |             if(id>=weight[i].size()) break;
      |                ~~^~~~~~~~~~~~~~~~~~
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