Submission #551040

#	Time	Username	Problem	Language	Result	Execution time	Memory
551040		Sergio_2357	Arranging Shoes (IOI19_shoes)	C++17	Compilation error	0 ms	0 KiB

shoes

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

using namespace std;

#define int long long

typedef vector<int> vi;
typedef vector<signed> vs;
typedef vector<vi> vii;

const int sizea = 100000;
const int sqrts = 316;
const int sqrtn = (sizea / sqrts + 1);

vi norms(sizea);
vi sqrtarr(sqrtn);

void update(int b, int e, int v)
{
    int idx = sizea;
    for (int i = b; i < e; i++) {
        norms[i] += v;
        if (i % sqrts == sqrts - 1) {
            idx = i + sqrts;
            break;
        }
    }
    for (int i = idx; i < e; i += sqrts) {
        sqrtarr[i / sqrts] += v;
        idx = i + 1;
    }
    for (int i = idx; i < e; i++) {
        norms[i] += v;
    }
}

int get(int i)
{
    return norms[i] + sqrtarr[i / sqrts];
}

int gidx(int v, int n)
{
    return v + (n / 2);
}

long long count_swaps(vs s_s)
{
    vi s(s_s.size());
    int n = s.size();
    for (int i = 0; i < n; i++)
        s[i] = s_s[i];
    iota(norms.begin(), norms.end(), 0);
    vi used(n, 0);
    map<vector<int>> last(n + 2);
    set<int> idx;
    for (int i = 0; i < n; i++)
        idx.insert(s[i]);
    for (int i = 0; i < n; i++)
        last[s[i]].push_back(i);
    for (int i : idx)
        sort(last[i].begin(), last[i].end());
    for (int i : idx)
        reverse(last[i].begin(), last[i].end());
    long long c = 0;
    for (int i = 0; i < n; i++) {
        if (used[i])
            continue;
        //cout << i << endl;
        int r = -s[i];
        int nxt = *prev(last[r].end());
        last[s[i]].pop_back();
        last[r].pop_back();
        used[i] = 1;
        used[nxt] = 1;
        //cout << i << ' ' << nxt << endl;
        //cout << get(i) << ' ' << get(nxt) << endl;
        int d = get(nxt) - get(i);
        d--;
        if (s[i] > 0)
            d++;
        //cout << d << endl;
        c += d;
        update(i + 1, nxt, 1);
    }
    return c;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(vs)':
shoes.cpp:56:19: error: wrong number of template arguments (1, should be at least 2)
   56 |     map<vector<int>> last(n + 2);
      |                   ^~
In file included from /usr/include/c++/10/map:61,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:81,
                 from shoes.cpp:2:
/usr/include/c++/10/bits/stl_map.h:100:11: note: provided for 'template<class _Key, class _Tp, class _Compare, class _Alloc> class std::map'
  100 |     class map
      |           ^~~
shoes.cpp:61:13: error: invalid types 'int[__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type {aka long long int}]' for array subscript
   61 |         last[s[i]].push_back(i);
      |             ^
shoes.cpp:63:18: error: invalid types 'int[long long int]' for array subscript
   63 |         sort(last[i].begin(), last[i].end());
      |                  ^
shoes.cpp:63:35: error: invalid types 'int[long long int]' for array subscript
   63 |         sort(last[i].begin(), last[i].end());
      |                                   ^
shoes.cpp:65:21: error: invalid types 'int[long long int]' for array subscript
   65 |         reverse(last[i].begin(), last[i].end());
      |                     ^
shoes.cpp:65:38: error: invalid types 'int[long long int]' for array subscript
   65 |         reverse(last[i].begin(), last[i].end());
      |                                      ^
shoes.cpp:72:29: error: invalid types 'int[long long int]' for array subscript
   72 |         int nxt = *prev(last[r].end());
      |                             ^
shoes.cpp:73:13: error: invalid types 'int[__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type {aka long long int}]' for array subscript
   73 |         last[s[i]].pop_back();
      |             ^
shoes.cpp:74:13: error: invalid types 'int[long long int]' for array subscript
   74 |         last[r].pop_back();
      |             ^