private static char analizarDyV(int[][] m, int filaInf, int filaSup, int colInf, int colSup) {
		if (filaInf == filaSup && colInf == colSup) {
			if (colInf == 0 && colSup == 0)
				return '0';
			else if (m[filaInf][colInf] == filaInf + colInf)
				return 's';
			else if (m[filaInf][colInf] == filaInf - colInf)
				return 'r';
			else
				return 'n';
		} else if (filaInf == filaSup) {
			int colMedia = (colInf + colSup) / 2;
			char r1 = analizarDyV(m, filaInf, filaSup, colInf, colMedia);
			char r2 = analizarDyV(m, filaInf, filaSup, colMedia + 1, colSup);
			return (r1 == '0' ? r2 : (r1 == r2) ? r1 : 'n');
		} else if (colInf == colSup) {
			int filaMedia = (filaInf + filaSup) / 2;
			char r1 = analizarDyV(m, filaInf, filaMedia, colInf, colSup);
			char r2 = analizarDyV(m, filaMedia + 1, filaSup, colInf, colSup);
			return (r1 == '0' ? r2 : (r1 == r2) ? r1 : 'n');
		} else {
			int filaMedia = (filaInf + filaSup) / 2;
			int colMedia = (colInf + colSup) / 2;
			char r1 = analizarDyV(m, filaInf, filaMedia, colInf, colMedia);
			char r2 = analizarDyV(m, filaInf, filaMedia, colMedia + 1, colSup);
			char r3 = analizarDyV(m, filaMedia + 1, filaSup, colInf, colMedia);
			char r4 = analizarDyV(m, filaMedia + 1, filaSup, colMedia + 1, colSup);
			return ((r1 == r2) && (r1 == r3) && (r1 == r4) ? r1 : 'n');
		}
	}