#include "artclass.h" int abs_(int a) { return a > 0 ? a : -a; } int style(int n, int m, int rr[500][500], int gg[500][500], int bb[500][500]) { int i, j; double contrast; contrast = 0; for (i = 0; i < n; i++) for (j = 1; j < m; j++) contrast += abs_(rr[i][j] - rr[i][j - 1]) + abs_(gg[i][j] - gg[i][j - 1]) + abs_(bb[i][j] - bb[i][j - 1]); for (i = 1; i < n; i++) for (j = 0; j < m; j++) contrast += abs_(rr[i][j] - rr[i - 1][j]) + abs_(gg[i][j] - gg[i - 1][j]) + abs_(bb[i][j] - bb[i - 1][j]); contrast /= n * m; return contrast < 20 ? 4 : (contrast >= 100 ? 3 : 1); }