Submission #481162

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
481162	2021-10-19 16:13:35	glome	Arranging Shoes (IOI19_shoes)	C++17	65 / 100	810 ms	3120 KiB

shoes

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
#include "shoes.h"
#include<bits/stdc++.h>
using namespace std;
bool check(vector<int> s) {
  for (int i = 0; i<s.size(); i+=2) {
    if(s[i] > 0 || -s[i] != s[i+1]) {
      return 0;
    }
  }
  return 1;
}
long long count_swaps(std::vector<int> s) {
  int n = s.size() / 2;
  if(s.size() <= 20000) {
    long long ans = 0;
    while(!check(s)) {
      vector<int> news;
      for (int i = 0; i<s.size(); i+=2) {
        if(-s[i] == s[i + 1] && s[i] < 0) {
          continue;
        }
        if(s[i] < 0) {
          for (int j = i + 1; j<s.size(); j++) {
            if(s[j] == -s[i]) {
              ans += abs((i + 1) - j);
              for (int k = 0; k<s.size(); k++) {
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Compilation message (stderr)

shoes.cpp: In function 'bool check(std::vector<int>)':
shoes.cpp:8:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |  for (int i = 0; i<s.size(); i+=2) {
      |                  ~^~~~~~~~~
shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:22:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |    for (int i = 0; i<s.size(); i+=2) {
      |                    ~^~~~~~~~~
shoes.cpp:27:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |      for (int j = i + 1; j<s.size(); j++) {
      |                          ~^~~~~~~~~
shoes.cpp:30:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |        for (int k = 0; k<s.size(); k++) {
      |                        ~^~~~~~~~~
shoes.cpp:44:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |      for (int j = i + 1; j<s.size(); j++) {
      |                          ~^~~~~~~~~
shoes.cpp:47:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |        for (int k = 0; k<s.size(); k++) {
      |                        ~^~~~~~~~~
shoes.cpp:67:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |  for (int i = 0; i<s.size() / 2; i++) {
      |                  ~^~~~~~~~~~~~~
shoes.cpp:79:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   79 |  for (int i = 0; i<s.size(); i++) {
      |                  ~^~~~~~~~~
shoes.cpp:88:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   88 |  for (int i = 0; i<s.size(); i++) {
      |                  ~^~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 0 / 20
• Subtask 4: 15 / 15
• Subtask 5: 20 / 20
• Subtask 6: 0 / 15