Submission #1165053

#	Time	Username	Problem	Language	Result	Execution time	Memory
1165053		chikien2009	Detecting Molecules (IOI16_molecules)	C++20	Compilation error	0 ms	0 KiB

molecules

#include <bits/stdc++.h>
#include "molecules.h"

using namespace std;

// inline void setup()
// {
// #ifndef ONLINE_JUDGE
//     freopen("test.inp", "r", stdin);
//     freopen("test.out", "w", stdout);
// #endif
//     ios_base::sync_with_stdio(0);
//     cin.tie(0);
//     cout.tie(0);
// }

vector<int> find_subset(short l, short u, vector<int> w)
{
    queue<short> q;
    vector<int> res, 
    vector<short> p[w.size()];
    short sum = 0, x = -1;
    for (short i = 0; i < w.size(); ++i)
    {
        p[i].resize(u + 1);
        for (short j = 0; j <= u; ++j)
        {
            p[i][j] = (i == 0 ? -1 : p[i - 1][j]);
        }
        for (short j = u; j >= w[i]; --j)
        {
            if (p[i][j - w[i]] != -1 || j == w[i])
            {
                p[i][j] = i;
                if (l <= j && x == -1)
                {
                    x = j;
                }
            }
        }
    }
    for (short i = w.size() - 1, j; i >= 0 && x > 0;)
    {
        j = p[i][x];
        res.push_back(p[i][x]);
        while (0 <= i && p[i][x] == res.back())
        {
            i--;
        }
        x -= w[res.back()];
    }
    reverse(res.begin(), res.end());
    return res;
}

// short main()
// {
//     setup();

//     short n, u, l;
//     vector<short> v;
//     cin >> n >> l >> u;
//     v.resize(n);
//     for (short i = 0; i < n; ++i)
//     {
//         cin >> v[i];
//     }
//     v = find_subset(l, u, v);
//     for (auto & i : v)
//     {
//         cout << i << " ";
//     }
//     return 0;
// }

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(short int, short int, std::vector<int>)':
molecules.cpp:21:19: error: invalid declarator before 'p'
   21 |     vector<short> p[w.size()];
      |                   ^
molecules.cpp:25:9: error: 'p' was not declared in this scope
   25 |         p[i].resize(u + 1);
      |         ^
molecules.cpp:44:13: error: 'p' was not declared in this scope
   44 |         j = p[i][x];
      |             ^
molecules.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~
molecules_c.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~