Submission #965378

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
965378	2024-04-18 12:05:01	akacool445k	Arranging Shoes (IOI19_shoes)	C++14	10 / 100	1 ms	348 KiB

shoes

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#include <queue>
#include "shoes.h"
using namespace std;
long long count_swaps(vector<int> s) {
  long long n = s.size();
  long long ans = 0;
  queue<int> a[n / 2 + 1], b[n / 2 + 1];
  for (int i = 0; i < n; i++) {
    if (s[i] < 0) a[-s[i]].push(i);
    else b[s[i]].push(i);
  }
  vector<int> c(n, 1);
  for (int i = 0; i < n; i++) {
    if (c[i] == 0) continue;
    int ss = 0;
    int x = s[i];
    int j = i;
    if (x < 0) {
      int y = -x;
      j = b[y].front();
      b[y].pop();
      a[x].pop();
    } else {
      j = a[x].front();
      a[x].pop();
      b[x].pop();
    }
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:25:7: warning: array subscript -1 is below array bounds of 'std::queue<int> [(<anonymous> + 1)]' [-Warray-bounds]
   25 |    a[x].pop();
      |    ~~~^
shoes.cpp:25:7: warning: array subscript -1 is below array bounds of 'std::queue<int> [(<anonymous> + 1)]' [-Warray-bounds]
shoes.cpp:25:7: warning: array subscript -1 is below array bounds of 'std::queue<int> [(<anonymous> + 1)]' [-Warray-bounds]
shoes.cpp:25:7: warning: array subscript -1 is below array bounds of 'std::queue<int> [(<anonymous> + 1)]' [-Warray-bounds]
shoes.cpp:25:7: warning: array subscript -1 is below array bounds of 'std::queue<int> [(<anonymous> + 1)]' [-Warray-bounds]
shoes.cpp:25:7: warning: array subscript -1 is below array bounds of 'std::queue<int> [(<anonymous> + 1)]' [-Warray-bounds]

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