oj.uz

Submission #486235

# Submission time Handle Problem Language Result Execution time Memory
486235 2021-11-11T03:01:09 Z joshualiu555 Knapsack (NOI18_knapsack) C++14
12 / 100
 1 ms 320 KB 
/*
  _____                                     _        _
 / ____|                                   | |      | |
| |  __ _ __ __ _ ___ ___ _   _ _ __   ___ | |_ __ _| |_ ___
| | |_ | '__/ _` / __/ __| | | | '_ \ / _ \| __/ _` | __/ _ \
| |__| | | | (_| \__ \__ \ |_| | |_) | (_) | || (_| | || (_) |
 \_____|_|  \__,_|___/___/\__, | .__/ \___/ \__\__,_|\__\___/
                           __/ | |
                          |___/|_|
*/

#include <fstream>
#include <iostream>
#include <iomanip>
#include <algorithm>
#include <numeric>
#include <utility>
#include <array>
#include <vector>
#include <set>
#include <map>
#include <stack>
#include <queue>
#include <cmath>
#include <cstring>
#include <climits>
#include <bitset>
#include <string>
#include <sstream>

using namespace std;

#define FOR(i, x, s) for (int i = x; i < s; i++)
#define TRAV(it, x) for (auto it = x.begin(); it != x.end(); it++)

using ll = long long;
const int INF = 2e5 + 5;
const int MOD = 1e9 + 7;
// DURL
const int dx[4] = {1, -1, 0, 0};
const int dy[4] = {0, 0, 1, -1};

int S, N;
map<int, vector<pair<int, int>>> weight_group;
int dp[2005];

int main()
{
    std::ios_base::sync_with_stdio(false); cin.tie(0);

//    ifstream cin(".in");
//    ofstream cout(".out");

    memset(dp, -1, sizeof(dp));

    cin >> S >> N;
    for (int i = 0; i < N; i++) {
        int V, W, K;
        cin >> V >> W >> K;
        weight_group[W].push_back(make_pair(V, K));
    }

    dp[0] = 0;
    for (auto it = weight_group.begin(); it != weight_group.end(); it++) {
        int weight = it -> first;
        // first = value, second = amount
        vector<pair<int, int>> items = it -> second;
        for (int i = S; i >= 0; i--) {
            if (dp[i] == -1) continue;
            int current = i;
            int id = 0;
            int left = items[id].second;
            while (current <= S) {
                if (id == items.size()) break;
                dp[current + weight] = max(dp[current + weight], dp[current] + items[id].first);
                left--;
                if (left == 0) {
                    id++;
                    left = items[id].second;
                }
                current += weight;
            }
        }
    }

    cout << *max_element(dp, dp + S + 1);

    return 0;
}

/*
 *
*/

//

Compilation message

knapsack.cpp: In function 'int main()':
knapsack.cpp:74:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |                 if (id == items.size()) break;
      |                     ~~~^~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct

Subtask #2
0 / 17.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 320 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 320 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Incorrect 1 ms 320 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #5
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Incorrect 1 ms 320 KB Output isn't correct
6 Halted 0 ms 0 KB -