Submission #481163

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
481163	2021-10-19 16:22:42	glome	Arranging Shoes (IOI19_shoes)	C++17	65 / 100	1088 ms	11204 KiB

shoes

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#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;
  bool jk = 1;
  set<int> s2;
  for (int i = 0; i<s.size(); i++) {
    s2.insert(s[i]);
  }
  if(s2.size() != 2) {
    jk = 0;
  }
  if(s.size() <= 20000 || jk) {
    long long ans = 0;
    while(!check(s)) {
      vector<int> news;
      for (int i = 0; i<s.size(); i+=2) {
 
 
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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:20:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |  for (int i = 0; i<s.size(); i++) {
      |                  ~^~~~~~~~~
shoes.cpp:30:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |    for (int i = 0; i<s.size(); i+=2) {
      |                    ~^~~~~~~~~
shoes.cpp:35:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |      for (int j = i + 1; j<s.size(); j++) {
      |                          ~^~~~~~~~~
shoes.cpp:38:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |        for (int k = 0; k<s.size(); k++) {
      |                        ~^~~~~~~~~
shoes.cpp:52:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |      for (int j = i + 1; j<s.size(); j++) {
      |                          ~^~~~~~~~~
shoes.cpp:55:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |        for (int k = 0; k<s.size(); k++) {
      |                        ~^~~~~~~~~
shoes.cpp:75:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   75 |  for (int i = 0; i<s.size() / 2; i++) {
      |                  ~^~~~~~~~~~~~~
shoes.cpp:19:11: warning: control reaches end of non-void function [-Wreturn-type]
   19 |  set<int> s2;
      |           ^~

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