제출 #533327

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
533327	2022-03-05 13:20:01	fhvirus	Navigation 2 (JOI21_navigation2)	C++17	100 / 100	848 ms	1008 KiB

Anna

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#include "Anna.h"
#include <cmath>
#include <vector>
namespace {
const int kMark = 13;
std::vector<std::vector<int>> flag;
void init(const int& N) {
  flag.assign(N, std::vector<int>(N, 0));
}
int get_val(const int& i, const int& j, const int& r, const int& c) {
  if (j <= c - 2) return  9;
  if (j >= c + 2) return 10;
  if (i <= r - 2) return 11;
  if (i >= r + 2) return 12;
  int di = i - r, dj = j - c;
  int val = (di + 1) * 3 + (dj + 1) + 1;
  return (val == 9 ? -1 : val);
}
bool solve(const int& N, const int& K, const std::vector<int>& R, const std::vector<int>& C, const int& offset) {
  for (int i = 0; i < N; ++i)
    for (int j = 0; j < N; ++j) {
      int k = ((i + offset / 3) % 3) * 3 + ((j + offset % 3) % 3);
      flag[i][j] = (k < 7 ? get_val(i, j, R[k], C[k]) : (k == 8 ? kMark : 0));
      if (flag[i][j] == -1) return false;
    }
  return true;
}
 
 
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Bruno

 
 
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컴파일 시 표준 에러 (stderr) 메시지

Anna.cpp: In function 'void Anna(int, int, std::vector<int>, std::vector<int>)':
Anna.cpp:55:36: warning: 'no_use' may be used uninitialized in this function [-Wmaybe-uninitialized]
   55 |    if (flag[i][j] == 0) flag[i][j] = no_use;

Bruno.cpp: In function 'std::vector<int> Bruno(int, std::vector<int>)':
Bruno.cpp:31:54: warning: 'mark_j' may be used uninitialized in this function [-Wmaybe-uninitialized]
   31 |   int i = (dk / 3 + 2 - mark_i) % 3, j = (dk % 3 + 2 - mark_j) % 3;
      |                                          ~~~~~~~~~~~~^~~~~~~~~
Bruno.cpp:31:23: warning: 'mark_i' may be used uninitialized in this function [-Wmaybe-uninitialized]
   31 |   int i = (dk / 3 + 2 - mark_i) % 3, j = (dk % 3 + 2 - mark_j) % 3;
      |           ~~~~~~~~~~~~^~~~~~~~~

• Subtask 1: 100 / 100