UVa 12155 - ASCII Diamond

Accepted date: 2016-03-22
Run Time: 0.006
Ranking (as of 2016-03-22): 5 out of 114
Language: C++

/*
  UVa 12155 - ASCII Diamond

  To build using Visual Studio 2012:
    cl -EHsc -O2 UVa_12155_ASCII_Diamond.cpp
*/

const int nr_letters = 'z' - 'a' + 1, col_max = 20000;
char buff[col_max + 2];

#include <cstdio>
#include <cstdlib>

int main()
{
  for (int serial = 1; ; serial++) {
    int N, row1, col1, row2, col2;
    scanf("%d %d %d %d %d", &N, &row1, &col1, &row2, &col2);
    if (!N)
      break;
    printf("Case %d:\n", serial);
    int size = 2 * N - 1, center = N - 1;
    buff[col2 - col1 + 1] = '\0';
    for (int r = row1; r <= row2; r++) {
      char* p = buff;
      for (int c = col1; c <= col2; c++, p++) {
        int i = abs(r % size - center) + abs(c % size - center);
        *p = (i < N) ? 'a' + i % nr_letters: '.';
      }
      puts(buff);
    }
  }
  return 0;
}