oj.uz

Submission #670032

# Submission time Handle Problem Language Result Execution time Memory
670032 2022-12-07T20:11:55 Z haxorman Arranging Shoes (IOI19_shoes) C++14
10 / 100
 1 ms 300 KB 
#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;

long long count_swaps(vector<int> vec) {
    map<int,vector<int>> pos;
    for (int i = 0; i < vec.size(); ++i) {
        pos[vec[i]].push_back(i);
    }
    
    int ans = 0;
    for (int i = 0; i < vec.size() - 1; ++i) {
        /*
        cout << vec[i] << "\n";
        for (auto x : pos[-vec[i]]) {
            cout << x << ' ';
        }
        cout << "\n---\n";
        */
        auto it = upper_bound(pos[-vec[i]].begin(), pos[-vec[i]].end(), i);

        ans += *it - i;
        if (vec[i] < 0) {
            --ans;
        }
    }
    return ans;
}

Compilation message

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:7:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    7 |     for (int i = 0; i < vec.size(); ++i) {
      |                     ~~^~~~~~~~~~~~
shoes.cpp:12:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     for (int i = 0; i < vec.size() - 1; ++i) {
      |                     ~~^~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 300 KB Output is correct

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 300 KB Output is correct
3 Incorrect 1 ms 212 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 300 KB Output is correct
3 Incorrect 1 ms 212 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Incorrect 1 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 300 KB Output is correct
3 Incorrect 1 ms 212 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 300 KB Output is correct
3 Incorrect 1 ms 212 KB Output isn't correct
4 Halted 0 ms 0 KB -