Submission #1092565

#	Time	Username	Problem	Language	Result	Execution time	Memory
1092565		AryanPadarthi	Knapsack (NOI18_knapsack)	C++11	Compilation error	0 ms	0 KiB

knapsack

// Source: https://usaco.guide/general/io

#include <bits/stdc++.h>

using namespace std;

int main() {
	int w;
	int n;
	int mval=0;
	int bob;
	cin >> w >> n;
	vector<int> points(n);
	vector<int> weight(n);
	vector<int> count(n);
	vector<int> useful;
	for (int i = 0; i < n; i++){
		cin >> points[i] >> weight[i] >> count[i];
	}
	vector<int> dp(w+1,0);
	//dp[0]=1;

	

	for (int i = 0; i < n; i++){
		for (int j = 0; j < count[i]; j++){
			bob = dp[useful[k]];
			for (int k = bob-1; k >-1 ; k--){
				
				if (dp[useful[k]] > 0){
					if (useful[k]+weight[i]<dp.size()){
						dp[useful[k]+weight[i]] = max(dp[useful[k]+weight[i]],dp[useful[k]] + points[i]);
						useful.push_back(useful[k]+weight[i]);
					}
				}
			}
			if (j==0){
				dp[weight[i]] = max(dp[weight[i]],points[i]);
				useful.push_back(weight[i]);
			}
		}
	}




	for (int i = 0; i < dp.size(); i++){
		if (dp[i]>mval){
			mval = dp[i];
		}
	}
	cout << mval;
}

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:27:20: error: 'k' was not declared in this scope
   27 |    bob = dp[useful[k]];
      |                    ^
knapsack.cpp:31:29: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |      if (useful[k]+weight[i]<dp.size()){
knapsack.cpp:47:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |  for (int i = 0; i < dp.size(); i++){
      |                  ~~^~~~~~~~~~~